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Ten distinct points are identified on the circumference of a circle. How many different convex quadrilaterals can be formed if each vertex must be one of these 10 points?

 Apr 26, 2020
 #1
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I think it is ten choose four, but I'm not so sure.

 Apr 27, 2020
 #2
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sounds reasonable to me.

Melody  Apr 27, 2020

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