The price of a variety of a commodity is Rs 7...

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The price of a variety of a commodity is Rs. 7 per kg and that of another is Rs. 12 per kg. Find the ratio in which two varieties should be mixed so that the price of the mixture is Rs. 10 per kg.

A. 3 : 4

B. 2 : 3

C. 4 : 5

D. 2 : 5

Answer: Option B

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