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December 21, 2014

December 21, 2014

Posted by **cha-cha** on Thursday, August 2, 2012 at 3:23am.

- math -
**Damon**, Thursday, August 2, 2012 at 4:15ampermutations of four of 10

n!/(n-r)!

10!/6!

10*9*8*7

5040

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