a dishonest grocer mixes two varieties o
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A dishonest grocer mixes two varieties of rice X and Y in the ratio 7/3 and 5/2 so as to make two mixtures A1 and A2 respectively. He now mixes A1 and A2 in the ratio 4:1 and prepares a new mixture A3. He now sells A3 at $1.5 per kg making a profit of 25%.
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