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A person goes in for an examination in w...

A person goes in for an examination in which there are four papers with a maximum of m marks from each paper. The number of ways in which one can get 2m marks is

A

`1/3 (n^2 -5n div 4)`

B

`1/3 (n+1)(2n^2 +4n+3)`

C

`1/6 (n+1)(n+4)`

D

none of the above

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The correct Answer is:
B
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