instruction:
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'.
question:
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 %
answer:
b


question:
Problem: a sum of money at simple interest amounts to rs . 825 in 3 years and to rs . 846 in 4 years . the sum is ? 
Options: a ) s . 738 , b ) s . 638 , c ) s . 650 , d ) s . 762 , e ) s . 735
answer:
d


question:
Problem: what is the rate percent when the simple interest on rs . 4000 amount to rs . 640 in 2 years ? 
Options: a ) 8.2 % , b ) 8 % , c ) 8.5 % , d ) 9 % , e ) 9.5 %
answer:

b