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CGP EDU Academic Team
Published on: August 14, 2026
Number of positive integral solution of x + y + z = 6 is
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Verified by ExpertsThe correct answer is:
D
Number of positive integral solution of x+y+z = n is
Coefficient of x n in (x+x 2 + x 3 + ...) 3 = Coefficient of x n (1+x+x 2 + ...) 3
= Coefficient of x n-3 in 
= Coefficient of x n-3 in (1-x) -3 = 
Here n = 6
∴ ∴ Required solution = 
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