Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 2 - Set Theory - 2.5 Survey Problems - Exercise Set 2.5: 1

Answer

Number of elements in Set A = 17 + 9 = 26.

Work Step by Step

From the given Venn diagram, the regions I and II belongs to the set A. If we add the number of elements in region I and II, we get the number of elements belongs to set A. Therefore the number of elements in Set A = 17 + 9 = 26.
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