There are 3 ants sitting on three corners of a triangle. All ants randomly pick a direction and start moving along the edge of the triangle. What is the probability that any two ants collide?
¾. The first ant goes some way around the triangle. If the other two both go the same way there are no meetings; otherwise there is one.
Source: Geeks for geeks.
This is one of several pages on puzzles and metapuzzles .