Which interval contains the median number of cars in line? Drivers pay a toll to pass over a busy bridge, and there are many toll booths that collect money. The city manager counted the total number of cars waiting to pay their tolls at 15-minute intervals during the day for a total of 50 observations. The histogram below shows the results. 0 10-20 cars O 20–30 cars O 30–40 cars 0 40–50 cars Bridge Toll Booth Traffic​