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: a reduction of 20 % in the price of oil enables a house wife to obtain 10 kgs more for rs . 1500 , what is the reduced price for kg ?
Options: a ) rs . 20 , b ) rs . 25 , c ) rs . 30 , d ) rs . 35 , e ) rs . 40
[EX A]: c

[EX Q]: Problem: the cost price of an article is 70 % of the marked price . calculate the gain percent after allowing a discount of 10 % .
Options: a ) 13.6 % , b ) 28.6 % , c ) 35.6 % , d ) 42.3 % , e ) none
[EX A]: b

[EX Q]: Problem: two numbers are 35 % and 42 % are less than a third number . how much percent is the second number less than the first ?
Options: a ) 11.769 % , b ) 10.769 % , c ) 12.769 % , d ) 11.69 % , e ) 11.89 %
[EX A]:
b