Answer
336
Work Step by Step
Use the formula of permutation: $_{n}$P$_{r}$=$\frac{n!}{(n-r)!}$. Plug in 8 for N and 3 for R:
$_{n}$P$_{r}$=$\frac{n!}{(n-r)!}$
$_{8}$P$_{3}$=$\frac{8!}{(8-3)!}$ -simplify-
$_{8}$P$_{3}$=$\frac{8!}{5!}$ -write using factorial-
$_{8}$P$_{3}$=$\frac{8*7*6*5*4*3*2*1}{5*4*3*2*1}$ -simplify-
$_{8}$P$_{3}$=336
