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: 12

Answer

The number of elements in set A = 15.

Work Step by Step

From the given Venn diagram, the regions I, II, IV, V belongs to set A. It's given from the Venn diagram that: The number of elements belongs to region I = 5 The number of elements belongs to region III = 6 The number of elements belongs to region IV = 2 The number of elements belongs to region V = 7 Therefor The number of elements in set A = 5 + 1 + 2 + 7 = 15.
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