Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 12 - Counting and Probability - Section 12.2 Permutations and Combinations - 12.2 Assess Your Understanding: 11

Answer

$P(7,0) = 1$

Work Step by Step

Use the formula $P(n, r) =\dfrac{n!}{(n-r)!}$: $P(7,0) = \dfrac{7!}{(7-0)!} = \frac{7!}{7!} = 1$. Note that when $r=0, P(n,r) = 1$.
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