What is the value of 7C2?

Mathematics

1 answer:

denis-greek [22]3 years ago

5 0

7!/2!

Step-by-step explanation:

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

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