Essentials of Statistics (5th Edition)

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

Chapter 4 - Probability - 4-6 Counting - Page 180: 4


The fundamental counting rule can be used.

Work Step by Step

Replacement is used, therefore both permutations rules and the combinations rule can't be used, because they can be used only in events without replacement. The factorial rule cannot be used either because of the same reason. Therefore the fundamental counting rule can be used.
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