SOLUTION: How many square matrices of 3 X 3 order can be formed by using only 5 ones and 4 zeros?

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Question 441843: How many square matrices of 3 X 3 order can be formed by using only 5 ones and 4 zeros?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The problem has the same solution as the number of ways of arranging 9 objects in a row where 5 objects are identical and another 4 objects identical, that is,
%289%21%29%2F%285%21%2A4%21%29+=+126.