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The number non-negative integral solutio...

The number non-negative integral solutions of `x_(1)+x_(2)+x_(3)+x_(4) le n` (where n is a positive integer) is:

A

`.^(n+3)C_(3)`

B

`.^(n+4)C_(4)`

C

`.^(n+5)C_(5)`

D

`.^(n+4)C_(n)`

Text Solution

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The correct Answer is:
b,d
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