Question

Evaluate 9!/6!3! . A. 1 B. 84 C. 168

Answer 1

Answer:84

Explanation:

Answer 2

B

Explanation:

Using the definition

n ! = n(n - 1)(n - 2).... × 3 × 2 × 1

Then

`(9!)/(6!3!)`

=
`(9(8)(7)(6)(5)(4)(3)(2)(1))/(6(5)(4)(3)(2)(1)3(2)(1))`

Cancel 6(5)(4)(3)(2)(1) on numerator/ denominator, leaving

`(9(8)(7))/(3(2)(1))`

=
`(504)/(6)`

= 84 → B