math help combinatorics
how many positive integers less than 1,000,000 have the sum of their digits equal to 17?
i understand how to find # of compositions of an integer w/ a restriction using weight & generating functions but it is beyond me how any of that can be applied to this question. |
Make a list!
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http://home.att.net/~numericana/answ....htm#possesses
Read the one I linked to, plus the one under it |
smay u r the man
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