At a traffic intersection where cars arriving from east can go straight, turn left or turn right. 50% of cars go straight and 20% turn left. A current study estimated that 20% of drivers never use their turn signals while 80% do employ them regularly and proplerly when making turns.
You're driving into the intersection from the east. The car in front of you does not have a turn signal on. What is the probability that the car is turning right?