Intro Stats
4th Edition
ISBN: 9780321826275
Author: Richard D. De Veaux
Publisher: PEARSON
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Textbook Question
Chapter 13, Problem 31E
Batteries A junk box in your room contains a dozen old batteries, five of which are totally dead. You start picking batteries one at a time and testing them. Find the
- a) The first two you choose are both good.
- b) At least one of the first three works.
- c) The first four you pick all work.
- d) You have to pick five batteries to find one that works.
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Chapter 13 Solutions
Intro Stats
Ch. 13.1 - Prob. 1JCCh. 13.3 - Prob. 2JCCh. 13.4 - Prob. 3JCCh. 13 - Pet ownership Suppose that 25% of people have a...Ch. 13 - Cooking and shopping Forty-five percent of...Ch. 13 - Sports What is the probability that a person likes...Ch. 13 - Prob. 4ECh. 13 - Late to the train A student figures that he has a...Ch. 13 - Field goals A nervous kicker usually makes 70% of...Ch. 13 - Titanic On the Titanic, the probability of...
Ch. 13 - Prob. 8ECh. 13 - Facebook Facebook reports that 70% of its users...Ch. 13 - Prob. 10ECh. 13 - Prob. 11ECh. 13 - Prob. 12ECh. 13 - Prob. 13ECh. 13 - Prob. 14ECh. 13 - Prob. 15ECh. 13 - Prob. 16ECh. 13 - Prob. 17ECh. 13 - Prob. 18ECh. 13 - Prob. 19ECh. 13 - Prob. 20ECh. 13 - Prob. 21ECh. 13 - 22. Pets In its monthly report, the local animal...Ch. 13 - Health The probabilities that an adult American...Ch. 13 - Immigration The table shows the political...Ch. 13 - Prob. 25ECh. 13 - Prob. 26ECh. 13 - Prob. 27ECh. 13 - Prob. 28ECh. 13 - Prob. 29ECh. 13 - Prob. 30ECh. 13 - Batteries A junk box in your room contains a dozen...Ch. 13 - Prob. 32ECh. 13 - Eligibility A university requires its biology...Ch. 13 - Benefits Fifty-six percent of all American workers...Ch. 13 - Prob. 35ECh. 13 - Prob. 36ECh. 13 - Prob. 37ECh. 13 - Prob. 38ECh. 13 - Unsafe food Early in 2010, Consumer Reports...Ch. 13 - 40. Birth order, finis In Exercises 20 and 26, we...Ch. 13 - Prob. 41ECh. 13 - Prob. 42ECh. 13 - Prob. 43ECh. 13 - Prob. 44ECh. 13 - Prob. 45ECh. 13 - Cars A random survey of autos parked in student...Ch. 13 - Prob. 47ECh. 13 - Prob. 48ECh. 13 - Prob. 49ECh. 13 - Prob. 50ECh. 13 - Prob. 51ECh. 13 - Prob. 52ECh. 13 - Prob. 53ECh. 13 - Prob. 54ECh. 13 - Drunks Police often set up sobriety...Ch. 13 - No-shows An airline offers discounted...Ch. 13 - Prob. 57ECh. 13 - Parts A company manufacturing electronic...Ch. 13 - HIV testing In July 2005, the journal Annals of...Ch. 13 - Polygraphs Lie detectors are controversial...
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- Medicine Out of a group of 9 patients treated with a new drug, 4 suffered a relapse. Find the probability that 3 patients of this group, chosen at random, will remain disease-free.arrow_forwardDetermine if the statement is true or false. If the statement is false, then correct it and make it true. If the probability that you will graduate is 0.63, then the probability that you will not graduate is -0.63.arrow_forwardFind the probability of each event. Drawing 5 orange cubes from a bowl containing 5 orange cubes and 1 beige cubesarrow_forward
- You toss two six-sided dice. What is the probability that the total of the two dice is 5?arrow_forwardRoulette American roulette is a game in which a wheel turns on a spindle and is divided into 38 pockets. Thirty-six of the pockets are numbered 1-36, of which half are red and half are black. Two of the pockets are green and are numbered 0 and 00 (see figure). The dealer spins the wheel and a small ball in opposite directions. As the ball slows to a stop, it has an equal probability of landing in any of the numbered pockets. (a) Find the probability of landing in the number 00 pocket. (b) Find the probability of landing in a red pocket. (c) Find the probability of landing in a green pocket or a black pocket. (d) Find the probability of landing in the number 14 pocket on two consecutive spins. (e) Find the probability of landing in a red pocket on three consecutive spins.arrow_forwardDividing a JackpotA game between two players consists of tossing a coin. Player A gets a point if the coin shows heads, and player B gets a point if it shows tails. The first player to get six points wins an 8,000 jackpot. As it happens, the police raid the place when player A has five points and B has three points. After everyone has calmed down, how should the jackpot be divided between the two players? In other words, what is the probability of A winning and that of B winning if the game were to continue? The French Mathematician Pascal and Fermat corresponded about this problem, and both came to the same correct calculations though by very different reasonings. Their friend Roberval disagreed with both of them. He argued that player A has probability 34 of winning, because the game can end in the four ways H, TH, TTH, TTT and in three of these, A wins. Robervals reasoning was wrong. a Continue the game from the point at which it was interrupted, using either a coin or a modeling program. Perform the experiment 80 or more times, and estimate the probability that player A wins. bCalculate the probability that player A wins. Compare with your estimate from part a.arrow_forward
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