Chapter 12.6, Problem 15P

Find the value of each expression.

${}_6{P}_5$

To determine

Find the value of each expression.

Answer to Problem 15P

720

Explanation of Solution

Given:

The expression is:

  $P{}_5$

Formula Used:

  $P{}_r=\frac{n!}{(n-r)!}$

Calculation:

  $P{}_5=\frac{6!}{(6-5)!}=\frac{6!}{1!}=6\cdot 5\cdot 4\cdot 3\cdot 2=720$ .