Q. A chemist requires 10, 12 and 12 units of chemicals A, B and C respectively for his analysis. A liquid product contains 5, 2 and 1 units of A, B and C respectively. A dry product contains 1, 2 and 4 units of A, B and C per carton.

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Let the person purchase x jars of the liquid product and y packets of the dry product.Now, x jars of liquid product and y packets of dry product contain 5x+y unitsof chemical A. As the person requires 10 units of chemical A for his anaylsisso the constraint is 5x+y10Similarly, the constraints for the chemical B and chemical C are respectively2x+2y12and x+4y12

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