The Golden Gate Bridge charges $8.20 for passenger cars and a whopping $32.80 for large trucks. Suppose that during the daytime 80% of all vehicles are passenger cars, the others are trucks, and that each car is independent of every other. If 25 vehicles cross the bridge during a particular hour of the day, what is the expected toll revenue for that hour

Expected Toll Revenue = $328

Explanation:

Charge for passenger cars = $8.20 per car

Charge for large trucks = $32.80 per truck

80% of all vehicles are passenger cars

20% of all vehicles are trucks

If 25 vehicles cross the bridge during a particular hour of the day, what is the expected toll revenue for that hour

25 x 80% = 20 passenger cars

25 x 20% = 5 Trucks

Expected Toll Revenue = ($8.20 per car x 20 passenger cars)

+ ($32.80 per truck x 5 Trucks)

Expected Toll Revenue = $328