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'.

[Q]: Problem: from january 1 , 1991 , to january 1 , 1993 , the number of people enrolled in health maintenance organizations increased by 20 percent . the enrollment on january 1 , 1993 , was 50 million . how many million people , to the nearest million , were enrolled in health maintenance organizations on january 1 , 1991 ? 
Options: a ) 38 , b ) 39 , c ) 40 , d ) 41 , e ) 42
[A]: e


[Q]: Problem: in order to obtain an income of rs . 1000 from 50 % stock at rs . 500 , one must make an investment of 
Options: a ) rs . 17000 , b ) rs . 16050 , c ) rs . 15400 , d ) rs . 10000 , e ) rs . 10500
[A]: d


[Q]: Problem: a person spent rs . 6,040 from his salary on food and 5,000 on house rent . after that he was left with 80 % of his monthly salary . what is his monthly salary ? 
Options: a ) 55,200 , b ) 65,200 , c ) 75,200 , d ) 85,200 , e ) 95,200
[A]:
a