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'.

[EX Q]: Problem: a producer of tea blends two varieties of tea from two tea gardens one costing rs 18 per kg and another rs 20 per kg in the ratio 5 : 3 . if he sells the blended variety at rs 22 per kg , then his gain percent is
Options: a ) 12 % , b ) 13 % , c ) 14 % , d ) 15 % , e ) 17 %
[EX A]: e

[EX Q]: Problem: at what rate percent per annum will the simple interest on a sum of money be 2 / 5 of the amount in 10 years ?
Options: a ) 4 % , b ) 74 % , c ) 64 % , d ) 74 % , e ) 94 %
[EX A]: a

[EX Q]: Problem: a retail appliance store priced a video recorder at 20 percent above the wholesale cost of $ 200 . if a store employee applied the 20 percent employee discount to the retail price to buy the recorder , how much did the employee pay for the recorder ?
Options: a ) $ 198 , b ) $ 216 , c ) $ 192 , d ) $ 230 , e ) $ 240
[EX A]:
c