Roles of Probability in different fields of life?

When your driving and you have tow routes you can take, one with red lights that shorter, and one without red lights and is longer. You try and figure out the probability that you will hit the lightes all green and make it sooner, or go the long way and not chance it. Also the chance that you'll be in a meeting and your phone will ring, so do you turn the ringer off or chance it.,,,,,,,,,,,,,,,,Ammar Qasim