Question

7. Evaluate 4P2

O

22

O

12

O

14

5

Answer 1

12

Explanation:

To evaluate 4P2, we will use the permutation formula as shown;

nPr =
`(n!)/((n-r)!)`

4P2 =
`(4!)/((4-2!)`

`= (4!)/(2!) \\= (4*3*2!)/(2!)\\ = 4*3\\= 12`

4P2 = 12