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The value of sum(r=0)^(n) sum(p=0)^(...

The value of `sum_(r=0)^(n) sum_(p=0)^(r) ""^(n)C_(r) . ""^(r)C_(p)` is equal to

A

`2^(n)`

B

`2^(2n)`

C

`2^(n+1)`

D

`3^(n)`

Text Solution

Verified by Experts

The correct Answer is:
B
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