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The value of 1^(1).^(20)C(1)+2^(2).^(20)...

The value of `1^(1).^(20)C_(1)+2^(2).^(20)C_(2)+3^(2).^(20)C_(3)+….+(20)^(2).^(20)C_(20)` is

A

`(420,19)`

B

`(420,18)`

C

`(380,18)`

D

`(380,19)`

Text Solution

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The correct Answer is:
A
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