A grocer purchased 80 kg of rice at the rate of rs 6.75 per kg and mixed it with 120 kg of rice,purchased at rs 8 per kg. At what rate per kg must he sell the mixture to have a gain of 20%.
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Answer:
Cost price =
[80(6.75)+120(8)]/200=7.5
Selling price =7.5(120)/100=9
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