Question

what is _7C_4
(the 7 and 4 are subscripts)

Answer 1

so you are asking for the 7C4 combination...?

\[^7C_{4} = \frac{7!}{4!(7 - 3)!}\]

just calculate it out

Answer 2

ok so i got 5040 for the top half, but can you tell me what to distribute first to get the bottom half please?

Answer 3

oh and also the 7 is a subscript also not a power

Answer 4

\[^{7}C_{4} = \frac{ 7! }{ 4!(7-4)! }\]
\[^{7}C_{4} = \frac{ 7! }{ 4!*3! }\]
\[^{7}C_{4} = \frac{ 7*6*5*4! }{ 4!*3! }\]
4! in denominator will cancel out the 4! in numerator
3! = 3*2*1 = 6
\[^{7}C_{4} = \frac{ 7*6*5 }{ 6 }\]
\[^{7}C_{4} = { 7*5 }\]

Answer 5

thank you!!

Answer 6

anytime :)