"Number of ways" question

physicsss

A circle has random points on its circumferance. How many ways can you form a quadrilateral, a triangle, and a octagon using these points?

I have no idea how to get an numerical answers for this question without using n to represent the number of points on the circle.

Thanks.

GregA

I think using 'n' is fine...just make a correct formula such that for any n you can get a specific answer.

arunbg

Of course you need n.
In how many ways can you choose the vertices of an r sided polygon from n points ?

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physicsss	"Number of ways" question Tweet A circle has random points on its circumferance. How many ways can you form a quadrilateral, a triangle, and a octagon using these points? I have no idea how to get an numerical answers for this question without using n to represent the number of points on the circle. Thanks.

GregA	I think using 'n' is fine...just make a correct formula such that for any n you can get a specific answer.

arunbg	Of course you need n. In how many ways can you choose the vertices of an r sided polygon from n points ?