Question

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

Answer 1

Answer:

12

Step-by-step explanation:

$nPr=\frac{n!}{(n-r)!}$

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

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

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

So....

$\frac{4*3*2*1}{2*1}=\frac{24}{2}=12$