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July 25, 2014

Homework Help: Math (Combinatorics)

Posted by Dan on Tuesday, May 21, 2013 at 1:28am.

Six boxes labeled 1,2,,6 are arranged in a line. Seven identical balls are to be placed into the boxes such that for any 1 ≤ k ≤ 6, there are at least k total balls amongst boxes 1,2,k. How many different placements of the balls into the boxes are possible?

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