The cost price of a pen is Rs. 200. If the marked price and selling price of the pen are 25% more and 20% more, respectively than its cost price, then find the difference between marked price and selling price of the pen.
Cost price of the pen = Rs. 200 ATQ; Marked price of the pen = (1.25 X 200) = Rs. 250 Selling price of the pen = (1.20 X 200) = Rs. 240 Required difference = (250 - 240) = Rs. 10
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