Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-4 Multiplication Rule: Basics - Basic Skills and Concepts - Page 164: 1

Answer

The second selected senator being Democrat if the first selected senator is Republican.

Work Step by Step

We know that $P(A|B)$ is the probability of A happening if B has already happened. Therefore $P(D|R)$ is the probability of the second selected senator being Democrat if the first selected senator is Republican.
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