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: a man has $ 10,000 to invest . he invests $ 4000 at 5 % and $ 3500 at 4 % . in order to have a yearly income of $ 500 , he must invest the remainder at : 
Options: a ) 4.6 % , b ) 3.6 % , c ) 6.4 % , d ) 7.8 % , e ) 8.9 %
[EX A]: c

[EX Q]: Problem: a shopkeeper sells his goods at cost price but uses a faulty meter that weighs 800 grams . find the profit percent . 
Options: a ) 20 , b ) 15 , c ) 25 , d ) 18 , e ) 19
[EX A]: c

[EX Q]: Problem: 26 % of employees are women with fair hair . 40 % of fair - haired employees are women . what percent of employees have fair hair ? 
Options: a ) 25 , b ) 30 , c ) 50 , d ) 55 , e ) 65
[EX A]:
e