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10 books were bought for Rs. 8 and 8 books were sold at Rs. 10. Then what was the gain percentage?1. 54.75%2. 57.25%3. 56.25%4. 55% |
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Answer» Correct Answer - Option 3 : 56.25% Given: Cost price of 10 books is Rs. 8 Selling price of 8 books is Rs. 10 Formula Used: Profit percentage = {(SP – CP)/CP} × 100 Calculation: Let 40 books (LMC of 8 and 10) were bought. CP of 40 books = Rs. {(8 × 40)/10} = Rs. 32 Their SP = Rs. (10 × 40/8) = Rs. 50 Profit percentage = (50 – 32)/32 × 100 = 56.25% ∴ Profit% is 56.25% |
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