In this task, you need to answer the given multiple-choice question on the gain. Gain is the value by which to multiply the input. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: 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 ? 
Options: a ) 35 % , b ) 37.5 % , c ) 45 % , d ) 47.5 % , e ) 50 %
[EX A]: e

[EX Q]: Problem: find number which is 60 % less than 120 . 
Options: a ) 18 , b ) 22 , c ) 28 , d ) 48 , e ) 98
[EX A]: d

[EX Q]: Problem: the population of a town is 8000 . it decreases annually at the rate of 10 % p . a . what will be its population after 2 years ? 
Options: a ) 5100 , b ) 5120 , c ) 5200 , d ) 5400 , e ) 6480
[EX A]:
e