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: jar a has 26 % more marbles than jar b . what percent of marbles from jar a need to be moved into jar b so that both jars have equal marbles ? 
Options: a ) 7.6 % , b ) 8.3 % , c ) 9.6 % , d ) 10.3 % , e ) 11.5 %
[A]: d


[Q]: Problem: if 28 % of a number exceeds 18 % of it by 7.2 , then find the number ? 
Options: a ) 50 , b ) 34 , c ) 55 , d ) 60 , e ) 90
[A]: e


[Q]: Problem: find compound interest on $ 16000 at 15 % per annum for 2 years 4 months , compounded annually . 
Options: a ) 6109 , b ) 6209 , c ) 6218 , d ) 6107 , e ) 6100
[A]:
c