Question 1014411
 I would like to select 3 paperback books from a list of 11 books to take on vacation. How many different sets of three books can I choose? 
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Ans: 11C3 = 11!/[(11-3)!*3!] = 11*10*9/1*2*3 = 165 sets of 3
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Cheers,
Stan H.
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