[note...n choose k entails the following: n!/(k!(n-k)!)
i have to simplify following statement but don't know how to go about it:
(n choose 4) + 2(n choose 5) + (n choose 6)
so if anyone could help me, that would be great
[note...n choose k entails the following: n!/(k!(n-k)!)
i have to simplify following statement but don't know how to go about it:
(n choose 4) + 2(n choose 5) + (n choose 6)
so if anyone could help me, that would be great