Question

A, taken two at a time 4) a. ** Evaluate each expression. 5) P2

Answer 1

we have

4P2

the formula is equal to

n!/(n-r)!

n=4

r=2

substitute

4!/(4-2)!

4!/2!=(4*3*2!)/2!

simplify

4*3=12

answer is 12