Multiple choice

The marked price of a watch is 1000. A retailer buys it at 810 after getting two successive discounts of 10% and another rate which is illegible. What is the second discount rate?

  1. 15%

  2. 10%

  3. 8%

  4. 6.5%

  5. 0
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B Correct answer
Explanation

After a 10% discount on 1000, the price becomes 900. Let the second discount be x%. Then 900 * (1 - x/100) = 810. Solving this gives 1 - x/100 = 0.9, so x = 10%.

AI explanation

After the first discount of 10% on the marked price of 1000, the price becomes 1000 * 0.90 = 900. Let the second discount rate be x%. The final price is 810, so 900 * (1 - x/100) = 810. Solving for x gives x = ((900 - 810) / 900) * 100 = 10%.

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