Question: "The cost price of a doll is Rs.250 and Marked price is Rs.300. What is the discount to be given to get the 20% profit?"
Solution: Let S.P=x
Profit%= (S.P - C.P)* 100 / C.P
20 = (x-250)* 100 / 250
20*250/100 = x-250
50 = x-250
50+250 = x
Hence S.P = Rs.300 & M.P = Rs.300
Hence discount = M.P-S.P = 300-300 = 0
Hence zero % discount is to be given to get 20% profit
Solution: Let S.P=x
Profit%= (S.P - C.P)* 100 / C.P
20 = (x-250)* 100 / 250
20*250/100 = x-250
50 = x-250
50+250 = x
Hence S.P = Rs.300 & M.P = Rs.300
Hence discount = M.P-S.P = 300-300 = 0
Hence zero % discount is to be given to get 20% profit
