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If a(n)=sum(r=0)^(n)(1)/(""^(n)C(r)) the...

If `a_(n)=sum_(r=0)^(n)(1)/(""^(n)C_(r))` then `sum_(r=0)^(n)(r)/(""^(n)C_(r))` equal to

A

`""^((n-1))a_(0)`

B

`n.a_(n)`

C

`(1)/(2)n.a_(n)`

D

`a_(n+1)`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE-II
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