#### Answer

30

#### Work Step by Step

We know that:
$_nP_r = \frac{n!}{(n-r)!}$
$_6P_2 = \frac{6!}{(6-2)!}$
$\frac{6!}{4!}$
We also know that:
$x! = x(x-1)(x-2)...(1)$
Thus, we have:
6*5 = 30

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Published by
Prentice Hall

ISBN 10:
0133281140

ISBN 13:
978-0-13328-114-9

30

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