Question

Help with calculating the binomial coefficient?

Answer 1

\[\left(\begin{matrix}9 \\ 7\end{matrix}\right)\]

Answer 2

I know how to start it, but I only get this far: 9!/(2!*7!)

Answer 3

9x8x8x7x6x5x4x3x2x1/2x1x7x6x5x4x3x2x1

Answer 4

all right thanks!

Answer 5

are there supposed to be two 8's in the numerator's?

Answer 6

there aren't, i figured it out myself though, thanks for the help either way :)