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A club has 15 members and needs to choose 2 members to be co-presidents. In how many ways can the club choose its co-presidents?

A club has 15 members and needs to choose 2 members to be co-presidents. In how many ways can the club choose its co-presidents?
asked 63.8k views
4 votes
A club has 15 members and needs to choose 2 members to be co-presidents. In how many ways can the club choose its co-presidents?

asked
User Fabian Schuiki
by
7.9k points

1 Answer

4 votes

Answer:

15 choose 2 = 105


=(15!)/(2!\left(15-2\right)!)

Explanation:

answered
User Pingu
by
9.0k points
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