A bag contains 12 balls, of which 5 are red (R) and 7 are blue (B). The balls are indistinguishable apart from color. We are interested in choosing 2 balls from the bag, one at a time. A ball is chosen at random from the bag, it is replaced and a second ball is chosen. (a) If the first ball is red, what is the probability that the second is also red? (b) If the first ball is not red, what is the probability that the second is also not red?"

A bag contains 12 balls, of which 5 are red (R) and 7 are blue (B). The balls are indistinguishable apart from color. We are interested in choosing 2 balls from the bag, one at a time. A ball is chosen at random from the bag, it is replaced and a second ball is chosen. (a) If the first ball is red, what is the probability that the second is also red? (b) If the first ball is not red, what is the probability that the second is also not red?"

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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