18. Coffee costing * 450 per kg was mixed with Chicory costing *225 per kg in the ratio 5 : 2 for a certain blend. If the mixture was sold at 405 per kg; find the gain or loss per cent.
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450 in 225 can do then which answer UK music night to ratio which is given if 5 is to 2 then you should multiply into 4 not 5 then the answer will be come to using kg
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