Essentials of Statistics (5th Edition)

Published by Pearson
ISBN 10: 0-32192-459-2
ISBN 13: 978-0-32192-459-9

Chapter 4 - Probability - 4-3 Addition Rule - Page 156: 40

Answer

Not always.

Work Step by Step

Not always, e.g. event A:someone has more than 8 red cars, B:someone has more than 6 yellow cars, C: someone has more than 7 red cars. Here, A and B are disjoint, B and C are disjoint, but A and C are not disjoint.
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