A toll bridge charges $1.00 for passenger cars and $2.50 for other vehicles. Suppose that during daytime hours, 60% of all vehicles are passenger cars. If 25 vehicles cross the bridge during a particular daytime period, what is the resulting expected toll revenue? [?Hint: ?Let X = the number of passenger cars; then the toll revenue ?h?(?X?) is a linear function of ?X.?]

Solution : Step 1 : It is given that a toll bridge charges $1.00 for passenger cars and $2.50 for other vehicles .If 25 vehicles cross the bridge during a particular daytime period. About 60% of all vehicles are passenger cars.We have to find the resulting expected toll revenue.