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Natali [406]
3 years ago
8

Somebody please help me idk what to do ‍♂️‍♂️

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
8 0

Answer:

21

Step-by-step 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

\frac{7(6)}{2(1)} = \frac{42}{2} = 21

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