A trader mixes three varieties of refined oil costing `100, `40 and `60 per litre in the ratio 2 : 4 : 3 in terms of litre, and sells the mixture at `66 per litre. What percentage of profit does he make?

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A trader mixes three varieties of refined oil costing `100, `40 and `60 per litre in the ratio 2 : 4 : 3 in terms of litre, and sells the mixture at `66 per litre. What percentage of profit does he make?






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