Answer
$17$
Work Step by Step
RECALL:
$n(A∪B) = n(A) + n(B) - n(A∩B)$
Use the formula above to obtain:
$n(A\cup B)= 8+ 12 -3 = 17$
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 - Chapter Review - Review Exercises - Page 888: 2
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