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: an agent , gets a commission of 4 % on the sales of cloth . if on a certain day , he gets rs . 12.50 as commission , the cloth sold through him on that day is worth
Options: a ) 312 , b ) 500 , c ) 887 , d ) 299 , e ) 132

Answer: a

Question: Problem: if the cost price of 50 articles is equal to the selling price of 20 articles , then the gain or loss percent is ?
Options: a ) 16 , b ) 127 , c ) 12 , d ) 18 , e ) 150

Answer: e

Question: Problem: a sum of money at simple interest amounts to rs . 815 in 3 years and to rs . 864 in 4 years . the sum is :
Options: a ) s . 650 , b ) s . 690 , c ) s . 668 , d ) s . 700 , e ) s . 760

Answer:
c