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: 91

Answer

$n(U)-n(B)=4$

Work Step by Step

We can count that $n(U)=8$ and $n(B)=4$, therefore: $n(U)-n(B)=4$
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