February 25, 2017

Homework Help: Math

Posted by Mark on Monday, July 8, 2013 at 12:12pm.

The squares of a 3×3 grid are filled with non-negative integers such that the sum of each row and the sum of each column is 7. How many different ways can the squares be filled? The numbers in each grid square does not need to be distinct. Rotations and reflections are distinct arrangements.

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