A stock market analyst figures the probabilities that two related stocks, A and B, will go up in price. She finds the probability that A will go up to be 0.7 and the probability that both stocks will go up to be 0.2. What should be her estimate of the probability that stock B goes up, given that stock A goes up? (Enter your probability as a fraction.)

A stock market analyst figures the probabilities that two related stocks, A and B, will go up in price. She finds the probability that A will go up to be 0.7 and the probability that both stocks will go up to be 0.2. What should be her estimate of the probability that stock B goes up, given that stock A goes up? (Enter your probability as a fraction.)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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In the woods, a hunter is shooting at a hare. The probability of success for his first shot is ½. If he misses the first shot, the probability of success for his second shot is 1/4. If he misses again, the hunter takes his last shot with probability of success 1/8. What is the probability that he will hit the hare?
A stock market analyst figures the probabilities that two related stocks, A and B, will go up in price. She finds the probability that A will go up to be 0.8 and the probability that both stocks will go up to be 0.3. What should be her estimate of the probability that stock B goes up, given that stock A goes up? (Enter your probability as a fraction.)
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Solve using the concept of probability
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