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 sale price sarees listed for rs . 600 after successive discount is 20 % and 5 % is ? 
Options: a ) 227 , b ) 358 , c ) 456 , d ) 787 , e ) 191
c

Problem: what will be the difference between simple and compound interest @ 20 % per annum on a sum of $ 500 after 2 years ? 
Options: a ) $ 10 , b ) $ 20 , c ) $ 25 , d ) $ 30 , e ) $ 40
b

Problem: a bookseller sells his books at a 10 % markup in price . if he sells a book for $ 11.00 , how much did he pay for it ? 
Options: a ) $ 14.40 , b ) $ 14.00 , c ) $ 10.00 , d ) $ 9.60 , e ) $ 5.00

c