12% of the cars sold by car dealer a were hybrid cars. 20% of the cars sold by car dealer b were hybrids. which statement must be true?
if both car dealers sold 50 total cars, dealer b sold 4 more hybrid cars.
car dealer b sold more hybrid cars than did car dealer a.
if both dealers sold the same total number of cars, car dealer b sold 8 more hybrids.
if car dealer b sold 120 total cars, 20 of them were hybrids.