College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 10 - Section 10.1 - Counting - 10.1 Assess Your Understanding - Page 687: 20

Answer

$31$

Work Step by Step

Not in A, according to the Venn diagram, means $15+2+10+4=31$ members.
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