Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 4 - Probability - 4-5 Multiplication Rule: Complements and Conditional Probability: 3

Answer

$P(B|A)$ is the probability that if A happens, then B will happen too.

Work Step by Step

E.g. event A:when choosing a random number, getting an odd one. Event B:when choosing a random number, getting one, that is divisible by 3. Here $P(B|A)$ is the probability that if we get an odd number, we get one that is divisible by 3.
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