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FrozenT [24]
3 years ago
6

How many different combinations of two can be made from 80 people?

Mathematics
1 answer:
Alexeev081 [22]3 years ago
3 0

Plugging directly into the combination formula, the answer is \binom{80}{2}=\frac{80!}{2!78!}=\frac{80\cdot 79}{2\cdot 1}=40\cdot 79=\boxed{3160}, where we have cancelled out common factors.

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