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: if a lends rs . 3500 to b at 10 % per annum and b lends the same sum to c at 12 % per annum then the gain of b in a period of 3 years is ? 
Options: a ) 200 , b ) 210 , c ) 220 , d ) 225 , e ) 230
b

Problem: julie put half of her savings in a savings account that pays an annual simple interest and half in a savings account that pays an annual compound interest . after two years she earned $ 120 and $ 122 from the simple interest account and the compound interest account respectively . if the interest rates for both accounts were the same , what was the amount of julie ' s initial savings ? 
Options: a ) 600 , b ) 720 , c ) 1080 , d ) 2200 , e ) 3600
e

Problem: a shopkeeper loses 15 % , if an article is sold for $ 102 . what should be the selling price of the article to gain 20 % ? 
Options: a ) $ 165 , b ) $ 174 , c ) $ 144 , d ) $ 164 , e ) $ 183

c