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'.

Problem: what profit percent is made by selling an article at a certain price , if by selling at 1 / 2 rd of that price , there would be a loss of 20 % ? 
Options: a ) 20 % , b ) 29 % , c ) 60 % , d ) 27 % , e ) 28 %
c

Problem: in an office , 20 percent of the workers have at least 5 years of service , and a total of 16 workers have at least 10 years of service . if 90 percent of the workers have fewer than 10 years of service , how many of the workers have at least 5 but fewer than 10 years of service ? 
Options: a ) 32 , b ) 64 , c ) 50 , d ) 144 , e ) 160
a

Problem: the present worth of a sum due sometime hence is rs . 576 and the banker ’ s gain is rs . 16 . the true discount is 
Options: a ) rs . 36 , b ) rs . 72 , c ) rs . 48 , d ) rs . 96 , e ) none

d