The Three Musketeers in a Semicircle Problem

Yet Another Probability Brain Teaser Which Requires Geometric Understanding. Give It a Shot and Match With Mine.

Image credit: Me

I came across this interesting problem on which my seniors were brainstorming late at night. It requires a bit knowledge of continuous random variables in probability and little bit visualization capability.

The problem goes like this…
There are three musketeers who stand on a circle randomly, which follows Uniform(0, 2πr) independently where r is the radius of the circle. They can help each other if they are close enough in case of a sudden attack by the enemies. Find the probability of them lying on the same semicircle.

Read my detailed solution at: The Three Musketeers in a Semicircle Problem

Rishi Dey Chowdhury
Rishi Dey Chowdhury
Master of Statistics

My research interests include Artificial Intelligence, Deep Learning and their applications in Computer Vision and NLP.