A trader wants 10% profit on the selling price of a product whereas his expenses amount to 15% on sales. What should be his rate of mark up on an article costing 9?  Answers
A) 20%
B) 66 2⁄3%
C) 30%
D) 100⁄3%
E) None of these
Let the SP of the article be x   Expenses = 15% of x = 0.15x   Profit = 10% of x = 0.10x   CP = 9 (given)   Therefore, 9 + 0.15x + 0.1x = x ⇒ x = 12   ∴ % increase for marked price = 12−9/9×100=100/3%   Answer 100⁄3%
<result>D</result>
A trader wants 10% profit on the selling price of a product whereas his expenses amount to 15% on sales. What should be his rate of mark up on an article costing 9?