### The cost price of an article is 80% of its marked price for sale. How much per cent does the tradesman gain after allowing a discount of 12%?

A. 20% B. 12% C. 10% D. 8% Answer: Option C
Let the marked price = Rs. 100 Then the cost price = 80% of 100 = Rs. 80 After allowing 12% discount on MP, SP become = Rs. 88. % profit = $\frac{8 \times 100}{80}$ = 10%