Question 1040237
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Evaluate nCr         
1. 5C3
~~~~~~~~~~~~~~~~~


5C3 = {{{C[5]^3}}} = {{{5!/(3!*2!)}}} = {{{(5*4)/2}}} = 10.


5C3 = {{{C[5]^3}}}  is the binomial coefficient = number of combinations  5  things taken  3  at a time.


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