## Geometry: Common Core (15th Edition)

Published by Prentice Hall

# Chapter 13 - Probability - 13-3 Permutations and Combinations - Lesson Check - Page 840: 4

120

#### Work Step by Step

$_nP_r = \frac{n!}{(n-r)!}$ $_6P_3 = \frac{6!}{(6-3!}$ $\frac{6!}{3!}$ We also know that: $x! = x(x-1)(x-2)...(1)$ Thus, we have: 6*5*4 120

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