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Determine n if ""^(2n)C(3):""^(n)C(3)=...

Determine n if
`""^(2n)C_(3):""^(n)C_(3)=11:1`

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The correct Answer is:
6
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Determine n if ""^(2n)C_(3):""^(n)C_(3)=12:1 .

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