Question : The marked price of a piano was Rs. 15,000. At the time of sale, there were successive discounts of 20%, 10%, and 10% respectively on it. The sale price was:
Option 1: Rs. 9,720
Option 2: Rs. 9,750
Option 3: Rs. 9,760
Option 4: Rs. 9,780
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Correct Answer: Rs. 9,720
Solution :
Single discount of 20% and 10% = $20 + 10 - \frac{20\times 10}{100} = 28\%$
Now single discount of 20%, 10%, and 10% = $28 + 10 - \frac{28\times 10}{100} = 35.2\%$
SP of the piano = $15000×\frac{100\:–\:35.2}{100}$ = Rs. 9,720
Hence, the correct answer is Rs. 9,720.
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