Difference between revisions of "Mock AIME 1 2006-2007 Problems/Problem 15"
(removed an incorrect solution)
Revision as of 14:50, 3 April 2012
Let be the set of integers . An element (in) is chosen at random. Let denote the sum of the digits of . The probability that is divisible by 11 is where and are relatively prime positive integers. Compute the last 3 digits of
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