Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 12 - Counting and Probability - Chapter Review - Review Exercises - Page 888: 7



Work Step by Step

Not in $B$ (denoted by $\overline{B}$) means the ones that are outisde of $B$. Using the given diagram gives: $n( \overline{B})=20+1+4+20=45$
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