An uneducated retailer marks all his goods at 50% above the cost price and thinking that he will still make 25% profit, offers a discount of 25% on the marked price. What is his actual profit on the sales?

A. 12.50 %
B. 13.50 %
C. 14 %
D. 14.50 %
Ans: A

Explanation:

Let C.P. = Rs. 100. Then, marked price = Rs. 150.
S.P. = 75% of Rs. 150
     = Rs. 112.50.
=> Gain% = 12.50%.