2012 AMC 12B Problems/Problem 12
Revision as of 15:51, 26 February 2012 by Newchie123 (talk | contribs) (Created page with "There are 20 Choose 2 selections however, we count these twice therefore 2* 20 C 2 = 380. The wording of the question implies D not E.")
There are 20 Choose 2 selections however, we count these twice therefore
2* 20 C 2 = 380. The wording of the question implies D not E.
