The value of overset(s)underset(r=0)Sigm...

The value of `overset(s)underset(r=0)Sigma overset(n)underset(s=1)Sigma""^(n)C_(s)""^(s)C_(r)` is

A

`3^(n)-1`

B

`3^(n)+1`

C

`3^(n)`

D

`3(3^(n)-1)`

Text Solution

Verified by Experts

The correct Answer is:

A

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