The marked price of an article is Rs. 5000 but due to festive offer a certain percent of discount is declared. Mr. x availed this opportunity and bought the article at reduced price. He then sold it at Rs. 5000 and thereby made a profit of 111/9 %. The percentage of discount allowed was ?

Answer: Option A

We find a percentage value of so we take or not take real value does not matters
% Profit = $$11\frac{1}{9}$$% = $$\frac{1}{9}$$
$$\frac{1\to \text{Profit}}{2\to \text{CP}}$$
So, SP = 10
Means in previous at the time of beginning the discount is 1 unit in 10 units MP
So, discount is = $$\frac{1}{10}$$ × 100 = 10%