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: what annual installment will discharge a debt of rs . 1092 due in 3 years at 12 % simple interest ? 
Options: a ) 442 , b ) 441 , c ) 440 , d ) 320 , e ) 532
[A]: a


[Q]: Problem: the profit earned by selling an article for rs . 832 is equal to the loss incurred when the same article is sold for rs . 448 . what should be the sale price for making 80 % profit ? 
Options: a ) 1152 , b ) 230 , c ) 960 , d ) 780 , e ) 400
[A]: a


[Q]: Problem: i sold a book at a profit of 10 % . had i sold it for $ 110 more , 15 % would have been gained . find the cost price ? 
Options: a ) $ 2000 , b ) $ 2200 , c ) $ 3000 , d ) $ 3120 , e ) $ 1540
[A]:
b