In what ratio should a variety of rice costing Rs. 6 per kg be mixed with anoth

Question

In what ratio should a variety of rice costing Rs. 6 per kg be mixed with another variety of rice costing Rs. 8.75 per kg to obtain a mixture costing Rs. 7.50 per kg?

Answer: Option A

Let us say the ratio of the quantities of cheaper and dearer varieties = x : yBy the rule of allegation, x/y = (87.5 - 7.50) / (7.50 - 6) = 5/6

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