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: ravi purchased a refrigerator and a mobile phone for rs . 15000 and rs . 8000 respectively . he sold the refrigerator at a loss of 4 percent and the mobile phone at a profit of 11 percent . overall he make a . 
Options: a ) 228 , b ) 288 , c ) 27 , d ) 200 , e ) 280
[A]: e


[Q]: Problem: find the annual income derived by investing $ 6800 in 30 % stock at 136 . 
Options: a ) 550 , b ) 1500 , c ) 250 , d ) 1300 , e ) 400
[A]: b


[Q]: Problem: how many ounces of a 60 % salt solution must be added to 60 ounces of a 20 percent salt solution so that the resulting mixture is 40 % salt ? 
Options: a ) 16.67 , b ) 30 , c ) 50 , d ) 60 , e ) 70
[A]:
d