Sat through campus placement Round 1 - Online assessment (Binary Tree related question - Pokemon Game implementation) Round 2 - Physical Interview ( Same pseudo code OA question + Probability question)

Probability Question - In a room with total of 0 to 60min, there are 2 entities lets say, A&B and each of them can stay in room for 20mins only starting at any point but should exit if 60min time is hit, so tell probablity that A and B never meet in there 20min stay