Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 11 - Counting Methods and Probability Theory - 11.7 Events Involving And; Conditional Probability - Exercise Set 11.7: 53

Answer

$\frac{3}{4}$

Work Step by Step

The probability of event B, assuming that the event A has already occurred, is called the conditional probability of B, given A. This probability is denoted by P(B|A). E: A red disk, given that an odd number is selected. A: There are 4 odd numbered disks. B: There are 3 disks that have odd numbers and are red. Thus, we have: P(B|A) = $\frac{3}{4}$
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