Probability And Random Processes : Problems And Solutions. However, when you do not replace the ball your probability on the second choice is 5/13 ( there would be 13 balls left in the urn, 5 of which would be green). P(AꓵB) is passing in both the events. About Slader. 0 Figure 1: Graphical representation of operations with events. 1 through 2. View Notes - Probability Answers from PHI 120 at University of Kentucky. Find the probability that both balls are the same color? b. Starting with this definition, it would (probably :-) be right to conclude that the Probability Theory, being a branch of Mathematics, is an exact, deductive science that studies uncertain quantities related to random events. (a) Find the transition matrix. Most of the problems require very little mathematical background to solve. Few examples on probability problem on dice shortcuts is given in this page below. 317 efficient solutions to HackerRank problems. A bag contains 1 Green ball, 2 Blue balls, and 1 White ball. What is the probability of getting an odd number on the spinner and a tail on the coin? None of the above. A ball is removed and replaced by two of the other color and then a second ball is drawn. I know one counter has been the Titans didn’t have the ball many plays, and. ) Let N be the number of games played. Probability and Statistics > Probability > Bayes' Theorem Problems. A diagram of a communication network is shown. Only those people who receive the a gene from both parents will be albino. If it is not chosen right down to the end, the probability is 100% for the final person. To start practicing, just click on any link. If the balls are drawn without replacement, then after every draw there will be one fewer ball in the pot, so the total number of balls for the second draw is 99. – This problem is from beanactuary. Which also lets you compute the probability that your AGI will solve all the unknown problems too (assuming problem probabilities are independent). None of these 19. Solved examples with detailed answer description, explanation are given and it would be easy to understand - Page 3. Ruma Falk, Understanding Probability and Statistics, A K Peters, 1993 Paul Nahin, Will You Be Alive In 10 Years From Now?, Princeton University Press, 2013 (Introduction). Homework solution 3 for APPM4/5560 Markov Process that are 0 or 1 with probability 1/2 each. Drug Problem Convey a merry feel towards dining room with colorful tennis balls suspending from ribbons around rehab chandelier. Statistics homework solutions and probability homework solutions added to serviceable advantages: statistics homework helper can help you overcome the all challenges of statistics problems; providing you with the highest quality statistics homework solutions and probability homework solutions, and timely delivery;. After solving all ten math questions write down total time taken by you to solve those questions. ) in a box (bag, drawer, deck, etc. Not all games on the NFL schedule are created equal, and that’s why the NFL is giving you the 1-6 Washington Redskins vs. Home; web; books; video; audio; software; images; Toggle navigation. Example 7 Find the probability that in 10 throws of a fair die a score which is a multiple of 3 will be obtained in at least 8 of the throws. (Posted 12/11) Read Sections 2. Thus, the total. In this problem, there is a tendency to reason that since the opposite face is either heads or tails, the desired probability is 1/2. So that you can easily get the logic of question. In the case where events and are independent (where event has no effect on the probability of event ),. They have 5! permutations. Now let Ji be the indicator of the event that the i’th red ball is pulled between the ﬁrst and the second black one. However, if the first ball was red, there will be 1 red and 2 blue balls left so the probability the second ball is blue is 2/3. Probability. Thus, the total possible out-comes are two and one is favourable to the event. 21-110: Problem Solving in Recreational Mathematics Homework assignment 7 solutions Problem 1. The site consists of an integrated set of components that includes expository text, interactive web apps, data sets, biographical sketches, and an object library. In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. What's the likelihood Joanna will find a half-dollar if she pulls just one coin out of her pocket?. Given two jars of red and blue balls, find the probability of choosing a red ball from Jar 1 after going through the steps. Let the number of blue balls be x Therefore, Total no. Sometimes you will have to do extra steps to solve the problem. Find the probability for each of the three possible location at time 2. The ratio of green balls to blue balls is 1 : 2 Bag 3 contains: Red balls equal total number of green and blue balls in bag 2. ) in a box (bag, drawer, deck, etc. Good quality fully solved "Probability" Problems as a part of Aptitude Test Question Answers have been given on this page. To find the desired probability, we need to find P(X > 6) = 1 − P(X ≤ 6), which can be determined readily using the c. Then find out twenty math problems related to this topic and write those on a paper. WORKED EXAMPLES 1 TOTAL PROBABILITY AND BAYES' THEOREM EXAMPLE 1. Two balls are drawn, one after the other, with the first ball replaced before the second is drawn. Culture of NFL officiating is the problem, ex-official says instead of Green Bay kicking a field goal with about 1:40 left and putting the ball back in the hands of comeback artist Matthew. Its goal is to help the student of probability theory to master the theory more pro foundly and to acquaint him with the application of probability theory methods to the solution of practical problems. Next lesson. Learn to find the probability when there are balls of different colors are there in a bag. Calculate the probability that: (i)both balls are green; (ii)the second ball is green. One pretends to remove one or more balls from the urn; the goal is to determine the probability of drawing one color or another. Probability and Statistics > Probability > Bayes' Theorem Problems. Going back to our pool ball example, let's say we just want to know which 3 pool balls are chosen, not the order. Mattel Inc. Important Notices PART I (Posted 12/11) Read Chapter 1: This is introductory material, you don't have to dwell on the details too much. Then 1¡ p is the probability to get a black ball. A single ball is drawn from each urn. Math 210 Lecture Notes: Ten Probability Review Problems Richard Blecksmith Dept. The probability (chance) is a value from the interval 0;1> or in percentage (0% to 100%) expressing the occurrence of some event. Now, the probability of getting `2` red balls when we draw out the balls one at a time is: Probability of first ball being red `= 4/10` Probability of second ball being red `= 3/9` (because there are `3` red balls left in the urn, out of a total of `9` balls left. 7th Grade Advanced Topic IV Probability, MA. Probability shortcut Tricks Pdf, Probability MCQ, Probability Objective Question & Answer Pdf. FREE initial consultation on an Errant Golf Ball issue you have identified. Very useful for introductory calculus-based and algebra-based college physics and AP high school physics. 1 through 2. What is the probability that this ball was in fact taken from Urn 2? (i. After the ball is drawn, it is then replaced and another ball is drawn. Probability and Statistics Games: Probability Game Probability Problems with Alphabets Probability Activity with Spinner Permutations Math Topics Probability Quizzes: Probability and Statistics Quiz Probability and Statistics Quiz 3rd Grade Probability Quiz Ratio Quiz What is the Probability?. This is not homework. Then EIi = 1 m+1, simply the probability that in a random ordering of the i’th red balls and all m black ones, the red comes ﬁrst. In the National Lottery, 6 numbers are chosen from 49. $\begingroup$ The problem with your answer is that the probability of picking $3$ red or responding to other answers. We saw that we can find the. (b) If you bet on "red", you win if the ball lands in a red lot. An urn contains n red and m black balls. Such an inverse probability is called a Bayes probability and may be obtained by a formula that we shall develop later. There are 3 red balls and 5 blue balls in a bag. Solutions, too, time permitting. This starts to build up a pattern. The choices are 2 black balls and 11 red balls, which are favorable, or a total of 13 favorable choices. Probability is the chance or likelihood that an event will happen. As you read, highlight the key information. 45, Self Test 7. part b) After John has put the ball back into the bag, Mary will then take at random a ball from the bag. MIT OpenCourseWare is a free & open publication of material from thousands of MIT courses, covering the entire MIT curriculum. Conditional Probability Calculator. You roll two 6-sided dice. Each month she must review 16 of the employees. Example 15: Three bags contain 3 red, 7 black; 8 red, 2 black, and 4 red & 6 black balls respectively. In this lesson, we solved two practice problems that showed us how to apply Bayes' theorem, one of the most useful real-world formulas used to calculate probability. In the first session, the prospective teachers solved individually the problem proposed and explained in detail their solutions in a response form. If you go to page T-9 and go to n=10, k=9 then you can scroll across to p=0. probability problems, probability, probability examples, how to solve probability word problems, probability based on area, examples with step by step solutions and answers, How to use permutations and combinations to solve probability problems, How to find the probability of of simple events, multiple independent events, a union of two events. What is concerning about third quarters when it. oT provide a more rigorous explanation of the probability of Heads in the rst ip (this is not required for a full mark solution), denote R as the event. You a provided with a simple mechanical balance and you are restricted to only 2 uses. Bayes’ theorem describes the probability of occurrence of an event related to any condition. Putting the Ball In Your Court With Cancer Coaches. From a bag containing 6 pink and 8 orange balls, 8 balls are drawn at random. Kasap University of Saskatchewan Boston Burr Ridge, IL Dubuque, IA Madison, WI New York San Francisco St. After buying them she had $10. This is verified by first a computer simulation, over 1 billion trials, and then simply by examining all possible ways to roll ten, 12-sided dice. Improve your math knowledge with free questions in "Probability of one event" and thousands of other math skills. It contains over 200 problems in discrete probability with detailed solutions for each. The occupancy problem in probability theory is about the problem of randomly assigning a set of balls into a group of cells. Note that in the formula for CDFs of discrete random variables, we always have , where N is the number of possible outcomes of X. 22) The probability that an event will occur is 0. Tennis balls, pool balls, and baseballs provide an introduction to probability in this math worksheet. If you know how to manage time then you will surely do great in your exam. So P(BjA) = 4 12 Conditional probability — Practice 3 / 11. Balls of 3 colours in a bag - Probability. Marcus Rashford and Anthony Martial could not strike up a connection during Man Utd's defeat by Bournemouth. In this problem, there is a tendency to reason that since the opposite face is either heads or tails, the desired probability is 1/2. Learn to find the probability when there are balls of different colors are there in. 3) On the bottom of the fraction, we put the total number of possible outcomes. [Delhi 2007] Sol. Draw a tree diagram for this experiment and ﬁnd the probability that the two balls are of diﬀerent colors. Probability is a measure of the likelihood that an event will occur. What is t he probability that all three balls. For example. Latrease bought two hot dogs and a soda for a total of $7. Solution: The probability to get first ball is red or the first event is 5/20. Arrange the balls in such a way that the user has highest probability to loose. A ball is again drawn at random. Suppose that 7 green balls and 14 purple balls are placed in an urn. Share a Story about your experiences with Math which could inspire or help others. P [buy neither] = 1 - [0. Question – A box contains 10 black and 10 white balls. We randomly draw a ball from the first bag and put it into the second bag. The text-books listed below will be useful for other courses on probability and statistics. To use the hypergeometric formula, the following values must be known. Recommended Problems: Problems 7. Starting with this definition, it would (probably :-) be right to conclude that the Probability Theory, being a branch of Mathematics, is an exact, deductive science that studies uncertain quantities related to random events. An urn contains three white balls, three black balls, and two red balls. 0 m/s and a pressure of 200000 Pa. Math 3C Homework 3 Solutions there is one of each color ball so the probability of getting the blue ball is 1 2. I didn't know how extensive the site was until I bought the book. What is the probability that the sixth draw will be a red ball? 2012-11-23: From Patty: The probability of drawing a red ball out of a bag containing one red ball and one black ball is 1/2. Ruma Falk, Understanding Probability and Statistics, A K Peters, 1993 Paul Nahin, Will You Be Alive In 10 Years From Now?, Princeton University Press, 2013 (Introduction). for ‘And’ event we multiply the two events. Now let Ji be the indicator of the event that the i’th red ball is pulled between the ﬁrst and the second black one. The probability of this occurring is. My HR Department insists that I rate my small staff (5 people) on a bell curve--one in the top 5% of all employees, one in the next 20%, one in the next 50%, one in the next 20%, and one in the bottom 5%. If the balls are drawn without replacement, then after every draw there will be one fewer ball in the pot, so the total number of balls for the second draw is 99. Two balls are drawn, one after the other, with the first ball replaced before the second is drawn. What is the probability the two sums are 390 apart? I think the sum would come close to a normal distribution. One ball is picked up randomly. Probability is the chance or likelihood that an event will happen. Sample Probability questions with solutions. When the probability of an event is zero then the even is said to be impossible. Probability Exercise - Mathematics or Quantitative Aptitude Questions Answers with Solutions for All other Competitive Exams. Question 15. Two balls are chosen from the jar, with replacement. Find the probability that the item selected at random is (i) defective (ii) non-defective 4. Yes, the probability of an event is a number between 0 and 1 (both inclusive). Great for problem solving, with connections to ratio and proportion. This problem requires us to find the probability that p 1 is less than p 2. oT provide a more rigorous explanation of the probability of Heads in the rst ip (this is not required for a full mark solution), denote R as the event. Pr[bin i has at least k balls] 6 n k 1 n k Using Stirling's approximation, we have Pr[bin i has at least k balls] 6 e k k (7. Here is a numerical solution to that problem. Pull balls from the urn one by one without replacement. This will be the number of red balls (i. After that has happened, there are 4 ways to fill the third, 3 to fill the fourth, and so on. Next lesson. A second urn contains 16 red balls and an unknown number of blue balls. What is the probability that this ball was in fact taken from Urn 2? (i. The left side of. However, if you toss two coins, the probability of getting 2 heads is a compound events because once again it combines two simple events. What is the probability that all 4 balls drawn from the urn are pink? Round to three decimal places. Conditional probability is the probability of an event happening, given that it has some relationship to one or more other events. Ball and urn problem using Bayes theorem, probability to get a white ball. Jar 1: (r1,b1) = (2,7). A ball is drawn at random from the box and not replaced. In statistics, an urn model is an idealized way of modeling real-life problems as if they were problems which involve drawing balls out of an urn, or box. The occupancy problem in probability theory is about the problem of randomly assigning a set of balls into a group of cells. from cartesian to cylindrical coordinates y2 + z. tossing a coin The higher the probability of an event, the more likely it is to occur, i. The pool balls have only the values 1, 2, and 3, and a sample mean can have one of only five values shown in Table 2. So what we get is the probability that we roll a 5 probability of a 5 is just going to be one sixth okay plus the probability of an odd which is going to be 3 out of 6 minus the probability of 5 and odd okay. the balls are mixed up and two balls are randomly picked out together. 50 Question 3 : A bag contains 6 white and 4 black balls. What is the probability that the ball remaining in the bag is also a solid? Answer - Solution. How many umbrellas should I have so that, if I follow the strategy above, the probability I get wet is less than 0. 2 Conditional Probability and Independent Events. When a coin is tossed, there are two possible outcomes: heads (H) or ; tails (T) We say that the probability of the coin landing H is ½. Balls of different colours in a bag is a standard problem of probability. 1 Gambler’s Ruin Problem Consider a gambler who starts with an initial fortune of $1 and then on each successive gamble either wins $1 or loses $1 independent of the past with probabilities p and q = 1−p respectively. We are only dealing with the probability of 4 on one die only and then, as a separate event, the probability of an even number on one die only. B is the event of passing in the second test. The problem involves m balls and n boxes (or "bins"). Almost all problems. Homework 10 Solutions (Section 12. Probability and statistics Here is a list of all of the skills that cover probability and statistics! These skills are organized by grade, and you can move your mouse over any skill name to preview the skill. A device runs until either of two components fails, at which point the device stops running. Probability And Random Processes : Problems And Solutions. Homework 4 Solutions Ryan Rosario Chapter 4 39. A ball is chosen at random. The occupancy problem in probability theory is about the problem of randomly assigning a set of balls into a group of cells. of total outcomes Let there be a bag with 10 blue balls, 7 red balls, 16 white balls, 8 green balls and 5 purple balls. For example. Two balls are drawn, one after the other, with the first ball replaced before the second is drawn. Cannot be determined. How did we come up with these numbers? The calculations are actually very simple, as long as you understand a little about independent assortment and probability. An urn has 5 red balls and 8 blue balls. This Collection of problems in probability theory is primarily intended for university students in physics and mathematics departments. When the probability of one event depends on another, the events are dependent. The answer depends on the behavior of the host if the car is behind Door A. Since the first ball drawn was blue, for the second draw there are only 49 blue balls in the pot, so the probability of drawing a second blue ball is 49/99. Depending on the problem being studied, the balls may be: Replaced after each draw (called sampling with replacement),. UPDATE: The average member of our site reports that they save 12-hours of preparation each work week. Problem: A drawer contains six bags numbered 1–6, respectively. Other than their color, the balls are indis-tiguishable, so if one is to draw a ball from the urn without peeking - all the balls will be. Let X be the number of black balls drawn until the ﬂrst white ball appears, and let Y = X +1 be the total number of balls. Solve the Problem. The addresses of the first three houses were 296 Boo Blvd, 300 Boo Blvd and 304 Boo Blvd, and the house numbers continued to increase by 4 down the. P (B ∪ R) = P (B) + P (R) = 3 10 + 5 10 = 8 10 = 0. => Required probability = 26 / 52 = 0. On each drop, we keep dividing the problem in half and half again until we get to our solution. Its goal is to help the student of probability theory to master the theory more pro foundly and to acquaint him with the application of probability theory methods to the solution of practical problems. Calculate: 1 The probability that the second ball is violet. Introduction Drawing balls from an urn without replacement is a classical paradigm in probability (Feller 1968). CHAPTER 7: THE CENTRAL LIMIT THEOREM. What could this be useful for? Doing this kind of analysis could help us know whether it's more valuable to discover more problems or discover more safety measures on the current margin. Balls of Two Colors: an urn contains balls of two colors. The urn contains balls of two or more colors. shufﬂed into a random order. For example, if you have a coin, the probability of flipping the coin and it landing on heads or tails is 1. You'll also be among the first to receive advance notice on special promotions and new product updates. Note that if we throw balls uniformly at random into bins, while the balls are not uniformly distributed, every bin has equal probability of having k balls. Two balls are drawn from the urn one after the other without replacement. lesson 9 6 problem solving geometric probability answers Students from any part lesson 9 6 problem solving geometric probability answers of the world - be it the UAE or USA, Saudi Arabia or China, Germany or Spain. An urn contains 6 red and 5 pink balls. The urn contains balls of two or more colors. Possibility Spaces. A softball pitcher has a 0. Probability problems for aptitude pdf download, probability problems and solutions for aptitude, probability problems, random variables and probability distributions problems and solutions, probability word problems with solutions and answers, probability distribution problems and solutions, probability problems on balls with solutions, basic. Below is a simulation of the birthday problem. Solution: Question 5. Probability is a measure of the likelihood that an event will occur. A common topic in introductory probability is solving problems involving coin flips. What is the probability they are in the order 2, 3, 4? The number of possible orders for three cards is 3! The probability the cards are found in one speciﬁc or-der is therefore 1 3! = 1 6. Some problems are easy, some are very hard, but each is interesting in some way. The simulation will graph the average calculated probability of each class size. A ball is chosen at random from urn 1 and put into urn 2. As long as the population is large enough, this sort of estimation does not pose a problem with using the binomial distribution. balls each are made from the bag. MIT OpenCourseWare is a free & open publication of material from thousands of MIT courses, covering the entire MIT curriculum. What is the probability of winning the National Lottery? The number of ways of choosing 6 numbers from 49 is 49 C 6 = 13 983. Find the probability of selecting a red ball. The probability of drawing a ball of a given color does not depend whether the balls are replaced or not. The probability of an event is given by - The Number Of Ways Event A Can Occur The total number Of Possible Outcomes. What fraction of the large by. Solution - The word "at least" implies the picking of either 1 white ball or both white balls. Probability Questions with Solutions. Two balls are then drawn in succession. Detailed solutions. Each time you pick two balls from the bin - the first ball and the second ball, both uniformly at random and you paint the second ball with the colour of the. it's simple , there is a bucket that contains 5 red balls and 3 white balls , a player picks up 4 balls out of the bucket without returning any. The number of candidates for the first, second and third posts are 3,4 and 2 respectively. Lecture Notes for Introductory Probability Janko Gravner Mathematics Department University of California Davis, CA 95616 [email protected] The ball lands in the garden '24 004B 50 ft 16. Find the probability that the total of the. However, when you do not replace the ball your probability on the second choice is 5/13 ( there would be 13 balls left in the urn, 5 of which would be green). Problem 2a. A ball is again drawn at random. This Probability Pdf we are Providing is free to download. ----- Solution 2----- This problem can be solved using the concept of Conditional Probability Let A be the event of getting a Queen in the first draw Total number of Queens = 4. The probability of this happening is =~ 0. The ball lands in the garden or the pool. A probability of 1 means that you are absolutely certain that an event will occur. This is, however, wrong, because given that heads came up, it is more likely that the two-headed coin was chosen. What is the probability that the event will not occur? 22) Is Event B dependent or independent of Event A? 23) A: A mosquito lands on your arm. Then EIi = 1 m+1, simply the probability that in a random ordering of the i’th red balls and all m black ones, the red comes ﬁrst. Problems in Probability: Problems with Solutions. 3 Hole analysis to identify potential errant golf ball issues for only $299. In a school of 1800 students, there are 875 girls. Example Problem #2 We discuss the solution to Example Problem #2 in the video that follows. Probability. Ask Math Questions you want answered. From past experience, she has found that the reviews take her approximately four hours each to do with a population standard deviation of 1. Share a Story about your experiences with Math which could inspire or help others. Mixed Probability Word Problems Worksheet 1 - What is the chance of randomly choosing a dress, lotto choices, and numbers. Let S be the sample space. What is concerning about third quarters when it. - Analyze and interpret data sets. Please do not email me completed problem sets. Problem: Solution: 1: Spin a spinner numbered 1 to 7, and toss a coin. Blitzstein and Jessica Hwang Departments of Statistics, Harvard University and Stanford University. Ruma Falk, Understanding Probability and Statistics, A K Peters, 1993 Paul Nahin, Will You Be Alive In 10 Years From Now?, Princeton University Press, 2013 (Introduction). Each of letters in the word MAGICIAN are on separate. Great for problem solving, with connections to ratio and proportion. So for example if there are 4 red balls and 3 yellow balls in a bag, the probability of choosing a red ball will be 4/7. The analysis using probability theory provides information which is certainly relevant, possibly decisive. The probability of getting an even card and the probability of getting a heart or a diamond are independent events, so the product of the probability of an even heart or an even diamond is ½ x 4/9 = 2/9 or ½ x 2/5 = 1/5, respectively. 227), a male Math professor (. Calculate the probability of drawing 2 hearts in a row from a deck of cards. It will generate a random list of birthdays time after time. What is wrong with this picture, solvers and solution. Heads, a ball is drawn from Urn 1, and if it is Tails, a ball is drawn from Urn 2. 139 Permutations nPr = n! (n − r)! is the number of ways of choosing r items from n when the order of the chosen items matters. After that has happened, there are 4 ways to fill the third, 3 to fill the fourth, and so on. Solution - Problem 1b As above, let be the number of red balls in the 5 selected balls. 15/28 How were these answers found? show more From a box containing 3 red balls and 5 green balls, 2 balls are randomly picked, one after the other and without replacement. What is the probability that this ball was in fact taken from Urn 2? (i. Probability 1) A bag contains a green ball, a white ball and a black ball all balls being of the same shape and size. Then a second ball is drawn. You can only upload photos smaller than 5 MB. In probability and statistics, an urn problem is an idealized mental exercise in which some objects of real interest (such as atoms, people, cars, etc. Tutorial on finding the probability of an event. The ball so drawn is found to be red in colour. Suppose that this experiment is done and you learn that a white ball was selected. Thus it is obtained by mixing two binomial probabilities: The following is the conditional probability : Thus _____ Answers for Problem 2. Problem 28 – Page 52: refer to lecture notes – part 1 – slide 12,16 An urn contains 5 red, 6 blue, and 8 green balls. Calculate the probability p that the ﬁrst extracted was white, when the second is white. Calculate the probability of drawing 2 hearts in a row from a deck of cards. View Notes - Probability Answers from PHI 120 at University of Kentucky. The probability of a man hitting the target at a shooting range is 1/4. Probability problem on Dice shortcut tricks are very important thing to know for your exams. Balls of different colours in a bag is a standard problem of probability. For example: if we have to calculate the probability of taking a blue ball from the second bag out of three different bags of balls, where each bag contains three different color balls viz. What is the probability of getting an odd number on the spinner and a tail on the coin? None of the above. Problems in Probability: Problems with Solutions. The problem is working out the numerator (the number on top). The expected value can really be thought of as the mean of a random variable. The easiest way to solve these types of probability problems is to write out all the possible dice combinations (that's called writing a sample space. Our original tree measure gave us the probabilities for drawing a ball of a given color, given the urn chosen. If it survives, we know the solution is in the top half of the building (floor 51 – 100). There are eight TABLE 11. Therefore, the events are independent and we can mutliply to determine the desired probability: P(R,R) = P(R)*P(R) = 3/5 * 3/5 = 9/25. What we can do is start with one coin, then add a coin at a time, and see what difference it makes to the probability. The sum is between Solution. Continuous growth. What will be the probability that it is white? Help me to solve the problem. I am stuck on one problem, and was wondering if anyone could show me why / how I am getting stuck. Solution to Problem 1. The probability that both balls are the same colour is 0. 8 A bag contains 5 red balls and some blue balls. 0 m/s and a pressure of 200000 Pa.