The federal government requires a car manufacturer to have a minimum miles per gallon (mpg) average over the cars it makes. Suppose that the models and mpg's for a manufacturer are Corsair (31 mpg), Futura (30 mpg), Retro (37 mpg), and Envy (44 mpg). Twenty percent of the cars sold are Corsairs, 30% are Futuras, 40% are Retros, and 10% are Envys. Find the average mpg for this manufacturer.

Question

Quizplus · Accepted Answer

The average mpg is calculated by multiplying each car's mpg by its percentage of sales and summing the results: (0.20 * 31) + (0.30 * 30) + (0.40 * 37) + (0.10 * 44) = 34.4 mpg.

The Federal Government Requires a Car Manufacturer to Have a Minimum