## Precalculus (6th Edition) Blitzer

The value of $_{8}{{P}_{3}}$ = $336$
We have to compare the provided expression with the standard form; it gives $n=8,r=3$. Put the values in the permutation formula: That is, \begin{align} & _{8}{{P}_{3}}=\frac{8!}{\left( 8-3 \right)!} \\ & =\frac{8!}{5!} \\ & =\frac{8\times 7\times 6\times 5!}{5!} \\ & =336 \end{align}