Evaluate the expression. P (9, 2) · P (6, 4)

Question

Layton Ford

Mathematics

15 April, 03:14

Evaluate the expression. P (9, 2) · P (6, 4)

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Elsa Bowers · Answer 1

The format of P (n, r) is used for permutations, where P (n, r) = n! / (n - r) !. This means that P (9, 2) = 9! / (9 - 2) ! = 9! / 7! = 9*8 = 72. Meanwhile, P (6, 4) = 6! / (6 - 4) ! = 6! / 2! = 6*5*4*3 = 360. Therefore, the product of P (9, 2) and P (6, 4) = 72*360 = 25920.