Question

Simplify the expression
4P2
A 12
B 2
C 4
D 24

Answer 1

12

Explanation:

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

So in your case, n = 4 and r = 2.

n! = 4! = 4*3*2*1

(n-r)! = (4-2)! = 2! = 2*1

So....

`(4*3*2*1)/(2*1)=(24)/(2)=12`