2- A driver has three ways to get from one city to another. There is (80%) probability of encountering a traffic jam on route (1), a (60%) probability on route (2) and a (30%) probability on route (3). Because of other factors, such as distance and speed limits, the driver uses route 1 (50%) of the time and route 2 and route 3 each (25%) of the time. If the driver call the dispatcher to inform him that she is in a traffic jam, find the probability that she has selected route 1. 3