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: the price of a t . v . set worth rs . 40000 is to be paid in 20 installments of rs . 1000 each . if the rate of interest be 6 % per annum , and the first installment be paid at the time of purchase , then the value of the last installment covering the interest as well will be ? 
Options: a ) 22678 , b ) 26699 , c ) 26788 , d ) 19000 , e ) 39000
[EX A]: e

[EX Q]: Problem: a shopkeeper sells 300 metres of cloth for rs . 18000 at a loss of rs . 5 per metre . find his cost price for one metre of cloth ? 
Options: a ) 12 , b ) 27 , c ) 29 , d ) 50 , e ) 65
[EX A]: e

[EX Q]: Problem: if w is 40 percent less than q , q is 40 percent less than y , and z is 46 percent less than y , then z is greater than w by what percent of w ? 
Options: a ) 4 % , b ) 18 % , c ) 36 % , d ) 40 % , e ) 50 %
[EX A]:
e