How do you evaluate 7C_2 ?

Helen Lewis

Helen Lewis

Answered question

2021-12-19

How do you evaluate 7C2 ?

Answer & Explanation

Carl Swisher

Carl Swisher

Beginner2021-12-20Added 28 answers

Explanation:
nCr=(nr)=n!r!(nr)!
nCr=(72)=7!2!(72)!=7!2!5!=50402120=50402040=21
Charles Benedict

Charles Benedict

Beginner2021-12-21Added 32 answers

Evaluate 7C2 using the formula nCr=n!r!(nr)!
7!2!(72)!
Subtract 2 from 7.
7!2!(5)!
Simplify 7!2!(5)!
=21
RizerMix

RizerMix

Expert2021-12-29Added 656 answers

I see no reason to write the solution for the third time, it is solved in one way

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