I was asked this question in an interview.
If there are four cars parked, one on each corner of a rectangular parking space, each car can move in either direction, what is the probability that two or more cars will collide with each other?
My idea is if $4$ cars are on the corners then we have to find if $2$ or more cars move in the same direction. But what are the total number of directions a car can move to.
Need help guys with mathematical solution.