A boy is late for school often. When approached by his teacher, he explained that it is not his fault. Then he provided some details. His father takes him from home to the bus stop every morning. The bus is supposed to leave at 8:00 am but the departure time is only approximate. The bus arrives at the stop anytime between 7:58 and 8:02 and immediately departs. The boy and his father try to arrive at the bus stop at 8:00 however due to variable traffic conditions they arrive anytime between 7:55 and 8:01. This is why the boy misses the bus so often.
Can you determine how often the boy is late for school?