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: walking 7 / 6 of his usual rate , a boy reaches his school 3 min early . find his usual time to reach the school ? 
Options: a ) 21 , b ) 28 , c ) 99 , d ) 77 , e ) 66

Answer: a


Question: Problem: two numbers are respectively 50 % and 100 % more than a third number . the percentage that is first of the second is ? 
Options: a ) 65 % , b ) 83 % , c ) 27 % , d ) 42 % , e ) 75 %

Answer: e


Question: Problem: at what price must an article costing rs . 50 be marked in order that after deducting 10 % from the list price . it may be sold at a profit of 25 % on the cost price ? 
Options: a ) 69.44 , b ) 62.0 , c ) 62.6 , d ) 62.1 , e ) 62.2

Answer:
a