Question 1014411
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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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{{{C[11]^3}}} = {{{(11*10*9)/(1*2*3)}}} = 11*5*3 = 165, 

the number of combinations of 11 objects taken 3 at a time.


See the lesson <A HREF=http://www.algebra.com/algebra/homework/Permutations/Introduction-to-Combinations-.lesson>Introduction to Combinations</A> in this site.