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What does it mean when there are variables on top of each other in parentheses in statistics?
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What does it mean when there are variables on top of each other in parentheses in statistics?

User Cebor
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1 Answer

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It's a combination:

\left( {{n} \atop {k}}\right)\equiv C(n,k)=(n!)/((n-k)!k!)
User Thomas Davis
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