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: by selling an article at rs . 600 , a shopkeeper makes a profit of 25 % . at what price should he sell the article so as to make a loss of 25 % ? 
Options: a ) s . 360 , b ) s . 480 , c ) s . 500 , d ) s . 450 , e ) s . 550
[EX A]: a

[EX Q]: Problem: a fellow borrowed a certain sum of money at 5 % per annum at simple interest and in 5 years the interest amounted to rs . 2250 less than the sum lent . what was the sum lent ? 
Options: a ) 1050 , b ) 1220 , c ) 1250 , d ) 1060 , e ) 3000
[EX A]: e

[EX Q]: Problem: a reduction of 20 % in the price of salt enables a lady to obtain 5 kgs more for rs . 100 , find the original price per kg ? 
Options: a ) 6 , b ) 1 , c ) 5 , d ) 4 , e ) 7
[EX A]:
c