Posted by **Bryan** on Thursday, January 26, 2012 at 9:06pm.

dent who wants to buy 3 CDs, but assume that there are 4 CDs featuring the piano, 6 CDs featuring the trumpet, and 7 CDs featuring the saxophone.

(1) In how many different ways can the 3 CD's be selected?

(2) In how many ways can the selection be made if CD's featuring at least 2 different instruments are selected?

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