Since the order of the selections does not matter, you want to compute the number of combinations of 3 out of 15:
15!
----- = 455
3! 12!
Alexander B.
asked • 11/06/20Stats Practice Question
A person going to a party was asked to bring 3 different bags of chips. Going to the store, she finds 15 varieties.
How many different selections can she make?
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