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: the length of a rectangular floor is more than its breadth by 200 % . if rs . 441 is required to paint the floor at the rate of rs . 3 / sq m , what would be the length of the floor ? 
Options: a ) 12 , b ) 18 , c ) 20 , d ) 21 , e ) 24
[EX A]: d

[EX Q]: Problem: calculate the dividend from caleb ' s stock , if caleb he invested rs . 2500 at 79 to obtain an income of rs . 200 . 
Options: a ) 6.32 , b ) 5.32 , c ) 7.32 , d ) 2.32 , e ) 1.32
[EX A]: a

[EX Q]: Problem: in a village of 2,700 people , 900 people are over 70 years old and 1200 people are female . it is known that 40 percent of the females are younger than 70 years old . if no one in the village is 70 years old , what is the probability that a person chosen at random is either a female or younger than 70 years old ? 
Options: a ) 7 / 8 , b ) 14 / 15 , c ) 29 / 30 , d ) 44 / 45 , e ) 131 / 135
[EX A]:
b