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: jackie has two solutions that are 2 percent sulfuric acid and 12 percent sulfuric acid by volume , respectively . if these solutions are mixed in appropriate quantities to produce 60 liters of a solution that is 10 percent sulfuric acid , approximately how many liters of the 12 percent solution will be required ? 
Options: a ) 18 , b ) 20 , c ) 48 , d ) 36 , e ) 42
[A]: c


[Q]: Problem: in an examination it is necessary for a candidate to get 45 % of the maximum marks to pass . a candidate who gets 180 marks , fails by 45 marks . find the maximum marks . 
Options: a ) 450 , b ) 600 , c ) 500 , d ) 550 , e ) 650
[A]: c


[Q]: Problem: if c is 14 % of a and 40 % of b , what percent of a is b ? 
Options: a ) 2.5 % , b ) 15 % , c ) 25 % , d ) 35 % , e ) 250 %
[A]:
d