At the 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 recent study estimated that 20% of drivers never employ their turn signals while 80% do employ them regularly and proplerly when making turns.
You're driving in the intersection from the east. The car in front of you doesn't have turn signal on. Determine the probability that the car is making a left or right turn?