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A dietician wishes to mix together two kinds of food `X` and `Y` in such a way that the mixture contains at least 10 units of vitamin A, 12 units of vitamin B and 8 units of vitamin C. The vitamin contents of 1 kg food is given below:

1 kg of food `X` costs Rs. 16 and 1 kg of food `Y` costs Rs. 20. Find the least cost of the mixture which will produce the required diet?

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The correct Answer is:
Least cost = ₹ 112(2 kg of food X and 4 kg of food Y)
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