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: the true discount on a bill of rs . 2460 is rs . 360 . what is the banker ' s discount ? 
Options: a ) rs . 432 , b ) rs . 422 , c ) rs . 412 , d ) rs . 442 , e ) none of these

A: b
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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
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Q: Problem: on selling 15 balls at rs . 720 , there is a loss equal to the cost price of 5 balls . the cost price of a ball is : 
Options: a ) s . 45 , b ) s . 50 , c ) s . 55 , d ) s . 60 , e ) s . 72

A:
e
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