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
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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