Sonya the frog chooses a point uniformly at random lying within the square in the coordinate plane and hops to that point. She then randomly chooses a distance uniformly at random from and a direction uniformly at random from {north, south, east, west}. All her choices are independent. She now hops the distance in the chosen direction. What is the probability that she lands outside the square?
Log in to save your progress.
Similar problems
Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.