Multiple choice

The marked price of a watch was Rs. 720. A man bought the same for Rs. 550.80 after getting two successive discounts, the first being 10%. The second discount rate is

  1. 18%

  2. 12%

  3. 14%

  4. 15%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the second discount be x%. The price after the first 10% discount is 720 * 0.9 = 648. Then 648 * (1 - x/100) = 550.80. Solving this gives (1 - x/100) = 550.80 / 648 = 0.85, so x = 15%.

AI explanation

After the first discount of 10%, the price becomes 90% of 720, which is 648. The second discount is applied to this new price, meaning 648 multiplied by the second discount rate equals the final reduction of 97.20 (648 - 550.80). Dividing 97.20 by 648 yields the second discount rate of 15%.

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