Question : A person buys three spectacles at the rate of Rs. 4,000 per spectacles. He sells the first spectacles at a profit of 30%, the second spectacles at a loss of 10% and the third spectacles at a loss of 10%. What is the total percentage of profit earned in the whole transaction?
Option 1: 7.14%
Option 2: 2.18%
Option 3: 3.33%
Option 4: 5.41%
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Correct Answer: 3.33%
Solution :
The cost price of each pair of spectacles is Rs. 4,000.
The total cost price for three spectacles is Rs. 4,000 × 3 = Rs. 12,000
The selling price of the first spectacles is Rs. 4,000 + 30% of Rs. 4,000 = Rs. 4,000 + Rs. 1,200 = Rs. 5,200
The selling price of the second spectacles is Rs. 4,000 – 10% of Rs. 4,000 = Rs. 4,000 – Rs. 400 = Rs. 3,600
The selling price of the third spectacles is Rs. 4,000 – 10% of Rs. 4,000 = Rs. 4,000 – Rs. 400 = Rs. 3,600
So, the total selling price for three spectacles is Rs. 5,200 + Rs. 3,600 + Rs. 3,600 = Rs. 12,400
Therefore, the total profit earned in the whole transaction is Rs. 12,400 – Rs. 12,000 = Rs. 400
The total percentage of profit earned in the whole transaction = $\frac{400}{ 12000}$ × 100 = 3.33%
Hence, the correct answer is 3.33%.
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