Thinking Mathematically (6th Edition)

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

Chapter 2 - Set Theory - 2.3 Venn Diagrams and Set Operations - Exercise Set 2.3 - Page 81: 93

Answer

31

Work Step by Step

Given, number of elements in set A i,e, n(A) = 17 number of elements in set B i.e. n(B) = 20 The common elements of both sets is n(A∩B) = 6. Formula for cardinal number of union of set is: n(A∪B) = n(A)+n(B) - n(A∩B) =17+20 -6 =37-6 n(A∪B) = 31
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