*Was asked this question in an interview, so not sure what the optimal answer is, but here goes:* Given a rectangle with length ***l*** and breadth ***b***, I pick 4 points inside it. What is the probability that the 4 points lie on the same half of the rectangle? Note: Two halves of the rectangle are defined by a single line passing through the intersection of its diagonals. So the rectangle cannot be divided into two halves of any arbitrary shapes of equal length.