SOLUTION: Michael is packing his bags for his vacation. He has 5 unique shirts, but only 4 fit in his bag. How many different groups of 4 shirts can he take?

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Question 1029863: Michael is packing his bags for his vacation. He has 5 unique shirts, but only 4 fit in his bag.
How many different groups of 4 shirts can he take?

Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Five chosen four at a time is found by
5! / ((5-4)!*4!) = 5 different ways.
Another way (but more time-consuming) is naming them...the roster method...for shirts called A,B,C,D,E we have
ABCD
ABCE
ABDE
ACDE
BCDE