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: the population of a town is 30000 . it decreases annually at the rate of 20 % p . a . what will be its population after 2 years ?
Options: a ) 4300 , b ) 19200 , c ) 5120 , d ) 5230 , e ) 5366
b

Problem: the sale price sarees listed for rs . 400 after successive discount is 30 % and 20 % is ?
Options: a ) 297 , b ) 879 , c ) 342 , d ) 762 , e ) 224
e

Problem: a person spends 40 % of his salary on food , 25 % on house rent , 15 % on entertainment and 15 % on conveyance . if his savings at the end of the month is rs . 1200 , then his salary per month in rupees is :
Options: a ) 4000 , b ) 24000 , c ) 8000 , d ) 10000 , e ) none of these
b