#### Answer

42

#### Work Step by Step

We know that:
$_nP_r = \frac{n!}{(n-r)!}$
$_7P_2 = \frac{7!}{(7-2)!}$
$\frac{7!}{5!}$
We also know that:
$x! = x(x-1)(x-2)...(1)$
Thus, we have:
7*6 = 42

Published by
Prentice Hall

ISBN 10:
0133281140

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

42

You can help us out by revising, improving and updating this answer.

Update this answerAfter you claim an answer you’ll have **24 hours** to send in a draft. An editor
will review the submission and either publish your submission or provide feedback.