HMMT 2020 C8
- Combinatorics
- Answer
Let and be concentric circles with radii 1 and 2 , respectively. Four points are chosen on the circumference of independently and uniformly at random, and are then connected to form a convex quadrilateral. What is the probability that the perimeter of this quadrilateral intersects ?
Dataset text NuminaMath olympiads. Quoted with source.
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\frac{22}{27}
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