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October 23, 2014

October 23, 2014

Posted by **Marie** on Wednesday, May 16, 2012 at 12:03am.

- algebra 2/help -
**Damon**, Wednesday, May 16, 2012 at 1:03amcombinations of ten taken two at a time

= 10!/[ 8!*2!] = 10*11/2 = 55

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