TASK DEFINITION: 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: Problem: 90 students represent x percent of the boys at jones elementary school . if the boys at jones elementary make up 40 % of the total school population of x students , what is x ? 
Options: a ) 125 , b ) 150 , c ) 225 , d ) 250 , e ) 500

SOLUTION: b

PROBLEM: Problem: a man can row his boat with the stream at 19 km / h and against the stream in 11 km / h . the man ' s rate is ? 
Options: a ) 4 kmph , b ) 2 kmph , c ) 7 kmph , d ) 8 kmph , e ) 3 kmph

SOLUTION: a

PROBLEM: Problem: if the cost price of 17 articles is same as the selling price of 25 articles . find the gain or loss percentage ? 
Options: a ) 30 % gain , b ) 30 % loss , c ) 32 % loss , d ) 40 % loss , e ) 50 % loss

SOLUTION:
c