If s(n)=sum(r=0)^(n)(1)/(.^(n)C(r))and t...

If `s_(n)=sum_(r=0)^(n)(1)/(.^(n)C_(r))and t_(n)=sum_(r=0)^(n)(r)/(.^(n)C_(r))`, then `(t_(n))/(s_(n))` is equal to

A

`n/2`

B

`n/2-1`

C

`n-1`

D

`(2n-1)/(2)`

Verified by Experts

The correct Answer is:

A

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