I have a Math final tomorrow and wondered if anyone here was good at math and if so if they could help me with these two questions?

1.

Eleven points lie on the circumference of a circle. How many inscribed hexagons. How many inscribed hexagons can be drawn having these points as vertices?

In how many ways can 3 marbles be drawn from a bag contain 5 green and seven black if at least 1 is green?


I've done these before, I just forget how. Thanks!

WG