Which among the following is the formulation having the lowest cost per unit for a diet having 10% fat and at least 30% protein? The diet has to be formed by mixing two ingredients.
Explanation:
Consider the options.
Option 1: P and Q have to be mixed in the proportion 4:1 to achieve 10% fat content. But this does not give 30% protein.
Option 2: P and S do not contain fat.
Option 3: P and R should be mixed in the proportion 3:1 to achieve 10% fat content. But 30% protein content is not achieved.
Option 4: Q and S should be mixed in the proportion 1:4 to achieve 10% fat content and 46% protein content. The cost of this mix per unit would be 6/5.
Option 5: R and S should be mixed in the proportion 1:3 to achieve 10% fat content and 50% protein content. The cost per unit of this mix would be 2.
Therefore, lowest cost is for Q and S.
Hence, option (d).
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