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: double of quarter of 5 percent written as a decimal is : 
Options: a ) 0.003 , b ) 0.0005 , c ) 0.025 , d ) 0.005 , e ) none of these
[A]: c


[Q]: Problem: a person buys an article at rs . 500 . at what price should he sell the article so as to make a profit of 35 % ? 
Options: a ) 600 , b ) 887 , c ) 256 , d ) 654 , e ) 675
[A]: e


[Q]: Problem: tickets to a certain concert sell for $ 20 each . the first 10 people to show up at the ticket booth received a 40 % discount , and the next 20 received a 15 % discount . if 52 people bought tickets to the concert , what was the total revenue from ticket sales ? 
Options: a ) $ 600 , b ) $ 740 , c ) $ 850 , d ) $ 900 , e ) $ 1,140
[A]:
d