A probability problem by Anikɘt Bhaumik
Probability
Level
3
There are 10 points in a plane of which no 3 points are collinear and 4 points are concyclic. What is the number of circles that can be drawn through at least 3 points of these points?
The answer is 117.
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1 solution
10c3 - 4c3 + 1