How do you evaluate 8C2?

cdsommegolfzp 2022-07-07 Answered
How do you evaluate 8C2?
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Answers (1)

SweallySnicles3
Answered 2022-07-08 Author has 21 answers
We have n C r = n ! ( n - r ) ! r !
8 C 2 = 8 ! ( 8 - 2 ) ! 2 ! = 8 ! 6 ! 2 ! = 6 ! 7 8 6 ! 2 ! = 6 ! 7 8 6 ! 2 ! = 56 1 2 = 28 .

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