The traffic-control monitor on the freeway shows 200 vehicles per minute passing the camera in 5 minutes. Of those vehicles, on average, 125 have one passenger, 60 have four or fewer passengers, and 15 have more than four passengers. What is P(vehicles with more than four passengers)?
Since we know that there are 15 cars with 4 or more passengers per minute, and since we know that we need to find out how many per 5 minutes, we need to multiply 15 by 5, which is 75.