Question : In what ratio must tea worth Rs. 10 per kg be mixed with tea worth Rs. 15 per kg, so that the resultant mixture costs Rs. 12 per kg?
Option 1: 3 : 5
Option 2: 2 : 3
Option 3: 3 : 2
Option 4: 2 : 5
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Correct Answer: 3 : 2
Solution : Using the rule of alligation, we get, Required ratio = (Higher value – Mean value) : (Mean value – Lower value) = (15 – 12) : (12 – 10) = 3 : 2 Hence, the correct answer is 3 : 2.
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