A car dealership has 40 cars on the lot, 30% of which are silver. If the dealership receives a new shipment of 80 cars, 40% of which are not silver, what percentage of total number of cars are silver? Choose the correct choice from the following choices: A) 35% B) 37.5% C) 45% D) 47.5% E) 50%
Number of silver cars before shipment = 30% of 40 = 12   Number of silver cars after shipment = 60% of 80 = 48   Total number of silver cars out of 120 = 48+12= 
<gadget id="calculator">48+12</gadget>
<output>60</output>
60, which is 50%   50% is my answer.
<result>E</result>
A car dealership has 40 cars on the lot, 30% of which are silver. If the dealership receives a new shipment of 80 cars, 40% of which are not silver, what percentage of total number of cars are silver?