Use the formula for nPr to evaluate the following expression.
9P4
nPr = n! / (n - r)!
9P4 = 9! / (9-4)!
= 9! / 5!
= (9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) / (5 x 4 x 3 x 2 x1)
= 3024
9P4
9P4 = 9! / (9-4)!
= 9! / 5!
= (9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1) / (5 x 4 x 3 x 2 x1)
= 3024