Difference between revisions of "2015 AIME I Problems/Problem 12"
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Revision as of 15:17, 20 March 2015
Problem
Consider all 1000-element subsets of the set {1, 2, 3, ... , 2015}. From each such subset choose the least element. The arithmetic mean of all of these least elements is 
, where 
and 
are relatively prime positive integers. Find 
.
