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: sam invested $ 1000 @ 20 % per annum for one year . if the interest is compounded half yearly , then the amount received by sam at the end of the year will be ? 
Options: a ) $ 1542 , b ) $ 1145 , c ) $ 1210 , d ) $ 1642 , e ) $ 1020
c

Problem: ravi and kavi start a business by investing â ‚ ¹ 3000 and â ‚ ¹ 72000 , respectively . find the ratio of their profits at the end of year . 
Options: a ) 2 : 24 , b ) 5 : 24 , c ) 7 : 24 , d ) 1 : 24 , e ) 3 : 24
d

Problem: a bag marked at $ 80 is sold for $ 68 . the rate of discount is ? 
Options: a ) 10 % , b ) 15 % , c ) 20 % , d ) 25 % , e ) 30 %

b