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""^(2n)C(2)-2""^(n)C(2)=...

`""^(2n)C_(2)-2""^(n)C_(2)=`

A

`n^(2)`

B

`(n-1)^(2)`

C

`(n+1)^(2)`

D

`2n^(2)`

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The correct Answer is:
A
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE
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