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: rs 50000 is divided into two parts one part is given to a person with 10 % interest and another part is given to a person with 20 % interest . at the end of first year he gets profit 8000 find money given by 10 % ? 
Options: a ) 20000 , b ) 40000 , c ) 50000 , d ) 60000 , e ) 70000
[A]: a


[Q]: Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ? 
Options: a ) 35 , b ) 49 , c ) 100 , d ) 102 , e ) 140
[A]: d


[Q]: Problem: a book is bought for $ 600 and sold for $ 624 . what is the profit in percentage ? 
Options: a ) 2 , b ) 4 , c ) 6 , d ) 8 , e ) 10
[A]:
b