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Let C(1), C(2), C(3)… are the usual bino...

Let `C_(1), C_(2), C_(3)`… are the usual binomial coefficients where `C_(r )= .^(n)C_(r )`. Let `S=C_(1)+2C_(2)+3C_(3)+…+nC_(n)`, then S is equal to

A

`n2^(n)`

B

`2^(n-1)`

C

`n2^(n-1)`

D

`2^(n+1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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