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 $r=0, P(n,r) = 1$.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
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 - Page 875: 11
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