simplify 8C5

Question

The "C" stands for combinations ( like combinations and permutations )

Answer 1

8C5 =

8*7*6*5*4
-------------
1*2*3*4*5

Note that this es equal to

8C3 = (8*7*6)/(1*2*3)

because the 4*5 just cancels out.

to figure nCm, just start with n, and count down for m factors in the top, and starting with 1, count up for m factors in the bottom.

If m > n/2, you can use n-m instead of m, as shown above.

Answer 2

so 336?