Question

What is the Answer when you Evaluate 8 P 5?

Answer 1

`^(n)P _(r) = (n!)/((n-r)!) \\ ^(8)P _(5) = (8!)/((8-5)!) \\ = (8!)/(3!) \\ = (8 * 7 * 6 * 5 * 4 * 3 * 2 * 1)/(3 * 2 * 1) \\ = 8 * 7 * 6 * 5 * 4 \\ = 6720`