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 83: 156

Answer

false

Work Step by Step

$n(A\cup B)=n(A)+n(B)$ This is false; the correct formula is: $n(A\cup B)=n(A)+n(B)-n(A\cap B)$
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