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: 3

Answer

$24$

Work Step by Step

RECALL: $n(A∪B) = n(A) + n(B) - n(A∩B)$ Thus, $ n(B)= n(A∪B)-n(A)+ n(A∩B)\\ n(B)= 30-12+6 = 24$
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