A trader mixes 40 kg of rice costing Rs. 60 per kg with 20 kg costing Rs. 75 per kg, and sells the mixture at Rs. 78 per kg. What is his profit percentage?
Correct answer C. 20%
Explanation
Total cost = 2,400 + 1,500 = Rs. 3,900 for 60 kg, i.e. Rs. 65 per kg. Profit% = (78 - 65)/65 × 100 = 20%.
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