So,there must be less than 14C2 solutions??How do i eliminate them?
Ok,could you check whether i can do it like this
x + y + z = 12
Case 1:x=y=z
No.of.ways = (4,4,4) = 1
Case 2:two of x,y,z are equal
No.of ways = (1,1,10),(2,2,8),(3,3,6),(5,5,2),(6,6,0),(0,0,12) = 6
Case 3: x,y,z are all...