Simplify permutations

Question

Evaluate each expression.
P(15, 0)
Part 1 of 1
Use the formula for permutations and simplify.
P(n, k) =
n!
(n − k)!
P(15, 0) =
15!
− 0
!
=
15!
!
=

Answer 1

nP0 = 1 for any value of n.

 

nP1 = n for any value of n.

 

nPn = n! for any value of n.