A shopkeeper professes to sell all things at a discount of 20% ,but increases selling price of each article by 30% .His gain on each article is
Answer: B
Let us assume cost price is 100.Then the marked price is 130 SP=130 * 80/100= 104. Profit % =(S.P-C.P)/(C.P) * 100=(104-100)/100 * 100 =4%