Question : If coffee powder costing Rs. 2500 per kg is mixed with coffee powder costing Rs. 1500 per kg, what ratio should be used so that the resulting mixture costs Rs. 2250 per kg?
Option 1: 1 : 4
Option 2: 4 : 1
Option 3: 3 : 1
Option 4: 1 : 3
Correct Answer: 3 : 1
Solution :
Given:
Type 1 coffee powder costs = Rs. 2500 per kg
Type 2 coffee powder costs = Rs. 1500 per kg
The cost of the mixture = Rs. 2250 per kg
Using the rule of alligation, we get,
Required ratio = (Higher value – Mean value) : (Mean value – Lower value)
So, the required ratio = 750 : 250 = 3 : 1
Hence, the correct answer is 3 : 1.
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