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OpenStudy (kayluh123):
Deon has 8 CDs that he is going to give away. He lets his best friend choose 2 of the 8 CDs. How many different groups of 2 CDs are possible?
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OpenStudy (anonymous):
Order does not matter, so this is a combination problem, where you want 8 C 2 (a combination 2 from 8).
OpenStudy (anonymous):
8 C 2 = 28.
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