SOLUTION: Given the integers from 1 to nine inclusive, how many ways can the sum 15 be obtained by taking them three at a time? Repitions are not allowed.

SOLUTION: Given the integers from 1 to nine inclusive, how many ways can the sum 15 be obtained by taking them three at a time? Repitions are not allowed.

Algebra.Com

Question 230883: Given the integers from 1 to nine inclusive, how many ways can the sum 15 be obtained by taking them three at a time? Repitions are not allowed.
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
1-2-3-4-5-6-7-8-9
X---------X---X--=15
X-------X-------X=15
--X-------X-X----=15
--X-----X-----X--=15
--X---X---------X=15
----X---X---X----=15
----X-X-------X--=15
------X-X-X------=15
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