Answer
15
Work Step by Step
We know that:
$x! = x(x-1)(x-2)...(1)$
Thus, we have:
$ \frac{6!}{4!} = \frac{6*5*4*3*2*1}{4*3*2*1*2*1}= 15$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 13 - Probability - Chapter Test - Page 875: 11
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