Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 10 - Section 10.6 - Counting Principles, Permutations, and Combinations - Exercise Set - Page 1105: 85


The provided statement does not make sense.

Work Step by Step

We know that in permutations, the order of things matters, but in combinations, the order of things does not matter. So, in this question, a four-note sound sequence can be arranged orderly. Therefore, the combinations formula should not be used. This question requires a permutations formula. Thus, the provided statement does not make sense.
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