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: in a class , if 50 % of the boys were girls , then there would be 50 % more girls than boys . what percentage of the overall class is girls ? 
Options: a ) 25 % , b ) 33.33 % , c ) 40 % , d ) 20 % , e ) 10 %
[EX A]: d

[EX Q]: Problem: the current birth rate per certain number of people is 52 , whereas corresponding death rate is 16 per same number of people . if the net growth rate in terms of population increase is 1.2 percent , find number of persons . ( initally ) 
Options: a ) 4000 , b ) 2000 , c ) 3000 , d ) 5000 , e ) 1000
[EX A]: c

[EX Q]: Problem: find the amount on rs . 5000 in 2 years , the rate of interest being 2 % per first year and 3 % for the second year ? 
Options: a ) 3377 , b ) 2678 , c ) 5460 , d ) 1976 , e ) 5253
[EX A]:
e