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'.
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Question: Problem: at what rate percent per annum will the simple interest on a sum of money be 1 / 5 of the amount in 10 years ? 
Options: a ) 2 % , b ) 7 % , c ) 9 % , d ) 3 % , e ) 1 %

Answer: a


Question: Problem: the difference between compound interest and simple interest on a certain amount of money at 5 % per annum for 2 years is 17 . find the sum : 
Options: a ) 4500 , b ) 7500 , c ) 5000 , d ) 6800 , e ) none of these

Answer: d


Question: Problem: mahesh marks an article 15 % above the cost price of rs . 540 . what must be his discount percentage if he sells it at rs . 456 ? 
Options: a ) 18 % , b ) 26.57 % , c ) 20 % , d ) 19 % , e ) none of these

Answer:
b