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The value of ""^(50)C(4)+sum(r=1)^(6)""^...

The value of `""^(50)C_(4)+sum_(r=1)^(6)""^(56-r)C_(3)` is

A

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

B

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

C

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

D

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

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The correct Answer is:
A
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