Suresh purchased 40 dozen notebooks at Rate of 50 Rs per dozen. He sold 10 dozens of it at 15% profit and the remaining 30 dozens at 25% profit. What is his percentage profit in the whole transaction?
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$18.8%$
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$20%$
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$22.5%$
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$25%$
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$None of these$
C
Correct answer
Explanation
Cost of 40 dozen at Rs 50/dozen = Rs 2000. 10 dozen sold at 15% profit: SP = 10 × 50 × 1.15 = Rs 575. 30 dozen sold at 25% profit: SP = 30 × 50 × 1.25 = Rs 1875. Total SP = 575 + 1875 = Rs 2450. Profit = 2450 - 2000 = Rs 450. Profit percentage = 450/2000 × 100 = 22.5%.