Question

Find the value of 9!/(9-2)!.

a. 72
b. 36
c. 504
d. 63

Answer 1

a. 72

Explanation:

9!/(9-2)!

= 9 x 8 x 7! / 7!

= 9 x 8

= 72

Answer 2

a. 72

Explanation:

Factorial (!) means take that number and multiply by all the numbers below it to 1

9! = 9*8*7*6*5*4*3*2*1

(9-2)! = 7! = 7*6*5*4*3*2*1

9*8*7*6*5*4*3*2*1

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7*6*5*4*3*2*1

Canceling common factors

9*8

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1

72