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: raman ' s salary was decreased by 50 % and subsequently increased by 50 % . how much percent does he loss . 
Options: a ) 75 , b ) 65 , c ) 45 , d ) 25 , e ) 85
[A]: d


[Q]: Problem: a man can row his boat with the stream at 19 km / h and against the stream in 11 km / h . the man ' s rate is ? 
Options: a ) 4 kmph , b ) 2 kmph , c ) 7 kmph , d ) 8 kmph , e ) 3 kmph
[A]: a


[Q]: Problem: a sum of money at simple interest amounts to rs . 830 in 3 years and to rs . 854 in 4 years . the sum is : 
Options: a ) 647 , b ) 698 , c ) 758 , d ) 847 , e ) 976
[A]:
c


