Math CentralQuandaries & Queries


Subject: combinations
Name: Steve
Who are you: Parent

I have 7 players on a basketball team/roster. If 5 players can play at the same time, how many different lineups are possible? Thanks!

Hi Steve,

The number of ways of choosing r object from n objects is called n choose r and written

n choose r

There is more information on combinations in a note in out Resource Room.

You have n = 7 and r = 5 and hence

7 choose 5


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