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'.

Problem: running at the same rate , 8 identical machines can produce 560 paperclips a minute . at this rate , how many paperclips could 18 machines produce in 6 minutes ? 
Options: a ) 1344 , b ) 3360 , c ) 7560 , d ) 50400 , e ) 67200
c

Problem: from the beginning to the end of 2007 , the price of a stock rose 20 percent . in 2008 , it dropped 25 percent . in 2009 , it rose 25 percent . what percent of the stock â € ™ s 2007 starting price was the price of the stock at the end of 2009 ? 
Options: a ) 80 , b ) 90 , c ) 95 , d ) 100 , e ) 112.5
e

Problem: the cost of 20 articles is equal to selling price of 10 . find the gain or loss percent ? 
Options: a ) 50 % , b ) 100 % , c ) 25 % , d ) 15 % , e ) 60 %

b