Question 844816
With a ratio of 7:5 , 7/(7+5) = 7/12 of sales are cars,
and 5/(7+5) = 5/12 are trucks.
7/12 * 84 = 7(84)/12 = 7(7) = 49 cars sold
5/12 * 84 = 5(84)/12 = 5(7) = 35 trucks sold