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Somebody please help me idk what to do ‍♂️‍♂️

Somebody please help me idk what to do ‍♂️‍♂️-example-1
User Alh
by
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1 Answer

0 votes

Answer:

21

Explanation:

Note that n! = n(n - 1)(n - 2) ..... × 3 × 2 × 1, thus

7! = 7 × 6 × 5 × 4 × 3 × 2 × 1

5! = 5 × 4 × 3 × 2 × 1

2! = 2 × 1

Hence

cancel 5 × 4 × 3 × 2 × 1 on numerator/ denominator, leaving


(7(6))/(2(1)) =
(42)/(2) = 21

User JGilmartin
by
6.4k points