Question

Solve the expression 7^P 2 (P = permutation)

42


2,640


120


5,040

Answer 1

42

Explanation:

`_aP_b = (a!)/((a - b)!)`

`_7P_2 = (7!)/((7 - 2)!)`

`_7P_2 = (7 * 6 * 5!)/(5!)`

`_7P_2 = 7 * 6`

`_7P_2 = 42`