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November 27, 2014

November 27, 2014

Posted by **kaykay** on Sunday, March 27, 2011 at 1:40pm.

- math -
**MathMate**, Sunday, March 27, 2011 at 2:04pmThe number of ways to pick m objects from n is

C(n,m) = n!/(m!(n-m)!)

So 2 objects from 7 there are C(n,m) [n choose m] ways.

C(n,m)=7!/(5!(7-5)!)=28

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