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'.
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Question: Problem: in a class , if 50 % of the boys were girls , then there would be 50 % more girls than boys . what percentage of the overall class is girls ?
Options: a ) 25 % , b ) 33.33 % , c ) 40 % , d ) 20 % , e ) 10 %

Answer: d

Question: Problem: an error 2 % in excess is made while measuring the side of a square . the percentage of error in the calculated area of the square is :
Options: a ) 1.04 , b ) 2.04 , c ) 3.04 , d ) 4.04 , e ) none of these

Answer: d

Question: Problem: on a certain day , tim invested $ 1,000 at 10 percent annual interest , compounded annually , and lana invested 2,000 at 5 percent annual interest , compounded annually . the total amount of interest earned by tim ' s investment in the first 2 years was how much greater than the total amount of interest earned by lana ' s investment in the first 2 years ?
Options: a ) $ 5 , b ) $ 15 , c ) $ 50 , d ) $ 100 , e ) $ 105

Answer:
a