Posted by nothing on Friday, February 22, 2013 at 8:01am.
How many ordered sets of nonnegative 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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