A shopkeeper sold an article offering a discount of 4% and earned a profit of 20%. What would have been the percentage of profit earned if no discount was offered? Select
A) 25
B) 28
C) 30
D) 32
E) 34

Rationale: "let c . p . be rs . 100 . then , s . p . = rs . 120 let marked price be rs . x . then , 96 / 100 x = 120 x = 12000 / 96 = rs . 125 now , s . p . = rs . 125 , c . p . = rs . 100 profit % = 25 % . answer : a"
Answer: A