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: if the cost price of 55 articles is equal to the selling price of 50 articles , then what is the percent profit ? 
Options: a ) 5 % , b ) 10 % , c ) 15 % , d ) 20 % , e ) 25 %
[EX A]: b

[EX Q]: Problem: if the difference between the compound interest & simple interest of a certain sum of money is rs . 72 at 12 % p . a . per two year . find the sum ( in rs . ) ? 
Options: a ) 200 / 15 , b ) 200 / 17 , c ) 220 / 17 , d ) 240 / 17 , e ) 260 / 17
[EX A]: b

[EX Q]: Problem: a dishonest dealer professes to sell goods at the cost price but uses a weight of 896 grams per kg , what is his percent ? 
Options: a ) 22 % , b ) 25 % , c ) 77 % , d ) 99 % , e ) 11.6 %
[EX A]:
e