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JEE MATHEMATICS MCQ: PERMUTATIONS

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Application +4 | -1

The number of positive integral solutions of

x+y+z=n, n \in N, n \geq 3

is

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Correct option: A

{ }^{n-1} C_2

Option A (

{ }^{n-1} C_2

) is correct because it represents the number of positive integral solutions for the given equation using stars and bars method.

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