## Algebra 2 (1st Edition)

Published by McDougal Littell

# Chapter 10 Counting Methods and Probability - Chapter Test - Page 737: 22

#### Answer

$0.9$

#### Work Step by Step

We know that $P(\text{A and B})=P(A)P(B|A)$, thus $P(A)=\frac{P(\text{A and B})}{P(B|A)}=\frac{0.36}{0.4}=0.9$

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