Answer
$31$
Work Step by Step
Not in $A$, which is $\overline{A}$, is the set of elements that are not in $A$.
Add all the numbers outside of the circle that represents set $A$.
Using the diagram: $n(\overline{A})=10+2+4+15=31$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 12 - Counting and Probability - Section 12.1 Counting - 12.1 Assess Your Understanding - Page 867: 20
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