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The value of ""^50C4+ underset (r=1) ove...

The value of `""^50C_4+ underset (r=1) overset (6) sum ""^(56-r)C_3` is :

A

`""^55C_3`

B

`""^55C_4`

C

`""^56C_4`

D

`""^56C_3`.

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MODERN PUBLICATION-BINOMIAL THEOREM-EXERCISE
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