A dealer mixes cereal costing Rs. 8 per kg with cereal costing Rs. 7 per kg and sells the mixture at Rs. 8 per kg and earns a profit of 712% on his sale price. In what proportion does he mix them.
Explanation:
Selling Price of the mixture = Rs. 8/kg
7.5% profit is earned on selling price, hence profit = Rs. 8 × 7.5% = Rs. 0.6
∴ CP of the mixture = 8 - 0.6 = Rs. 7.4
∴ Ratio = 0.4 : 0.6 = 2 : 3
Hence, option (b).
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