College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 10 - Section 10.2 - Permutations and Combinations - 10.2 Assess Your Understanding: 9

Answer

$P(4,4)=24$

Work Step by Step

Use the permutation formula to obtain: $P(n,r)=\frac{n!}{(n-r)!}$ $0!=1$ $P(4,4)=\frac{4!}{(4-4)!}=\frac{4!}{0!}=\frac{4\cdot3\cdot2\cdot1}{1}=24$ Or $P(4,4)=4\cdot3\cdot2\cdot1=24$ $P(4,4)=24$
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