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'.

[EX Q]: Problem: seed mixture x is 40 % ryegrass and 60 % bluegrass by weight ; seed mixture y is 25 % ryegrass and 75 % fescue . if a mixture of x and y contains 31 % ryegrass , what percent of the weight of the mixture is from mixture x ? 
Options: a ) 20 % , b ) 30 % , c ) 40 % , d ) 50 % , e ) 60 %
[EX A]: c

[EX Q]: Problem: a cycle is bought for rs . 900 and sold for rs . 1150 , find the gain percent ? 
Options: a ) 15 , b ) 20 , c ) 27.77 , d ) 40 , e ) 12
[EX A]: c

[EX Q]: Problem: in an election between the two candidates , the candidates who gets 60 % of votes polled is winned by 280 votes majority . what is the total number of votes polled ? 
Options: a ) 1400 , b ) 1600 , c ) 1800 , d ) 2000 , e ) 2100
[EX A]:
a