the value of ""^50C(4) + underset( r...

the value of ` ""^50C_(4) `+` underset( r=1) overset( 6 ) sum ""^(56 - r) C_(3)` is

A

`""^(55)C_(4)`

B

`""^(55)C_(3)`

C

`""^(56)C_(3)`

D

`""^(56)C_(4)`

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The correct Answer is:

D

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