Answer
5040
Work Step by Step
We know that:
$_nP_r = \frac{n!}{(n-r)!}$
This gives
$_{10}P_4 = \frac{10!}{(10-4)!}$
$\frac{10!}{7!}$
$10*9*8*7$
5040
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281140
ISBN 13:
978-0-13328-114-9
Chapter 12 - Data Analysis and Probability - 12-6 Permutations and Combinations - Lesson Check - Page 765: 4
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