Posted by **nothing** on Friday, February 22, 2013 at 8:01am.

How many ordered sets of non-negative integers (a,b,c,d) are there such that a+b+c+d=10?

- maths -
**Knights**, Friday, February 22, 2013 at 8:50am
1,1,1,7

1,1,2,6

1,1, 3, 5

1,1, 4, 4

etc.

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