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The value of the expressionunderset(r=0)...

The value of the expression`underset(r=0)overset(n)Sigma overset(n)underset(p=0)Sigma""^(n)C_(r) ""^(r )C_(p)`equals

A

`2^(n)-1`

B

`3^(n)-1`

C

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

D

`n-2^(n)-1`

Text Solution

Verified by Experts

The correct Answer is:
B
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