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What is the value of 7C2?

What is the value of 7C2?
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What is the value of 7C2?

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User John Rocha
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1 Answer

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7!/2!

Explanation:

nCr=(nr)=n!r!(n−r)! 7C2=(72)=7!2!(7−2)!=7!2!⋅5!=50402⋅120=5040240=21.

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User Danae
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