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sum(r=0)^(n-1) (""^(n)C(r))/(""^(n)C(r) ...

`sum_(r=0)^(n-1) (""^(n)C_(r))/(""^(n)C_(r) + ""^(n)C_(r+1))` is equal to

A

`n/2`

B

`(n+1)/(2)`

C

`(n(n+1))/(2)`

D

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

Text Solution

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The correct Answer is:
A
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