Imagine you are a bus driver. The driver
have a long work day. You pick up 3 adults and a baby. Later you drop of the an adult and baby. The driver picks up 7 more people. The next stop you drop off 4 people. You then pick up 10 people. Now you drop off everyone and the driver is off to lunch. Now the driver picks up 30 people. 15 people get off. Now it is the end of the day. What color eyes does the driver have???