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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

`""^(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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DISHA PUBLICATION-BINOMIAL THEOREM -EXERCISE-1 (CONCEPT BUILDER )
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  12. Consider the expansion of (1 + x)^(2n+1) If the coefficients of x^(r...

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  15. In the expression (x+1) (x+4)(x+9)(x+16)"….."(x+400), the coefficient ...

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  16. (C(1))/(C(0))+(2.C(2))/(C(1))+(3.C(3))/(C(2))+ . . .+(20.C(20))/(C(19)...

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  17. Given positive integers r >1,n >2 and that the coefficient of (3r d)t ...

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