Correct Answer: 3 : 2
Explanation:
Step 1: Convert percentages to milk content
Step 2: Use alligation rule
First bottle (64%) Second bottle (74%) \ / \ / Target mixture = 68% / \ / \ 74 - 68 = 6 68 - 64 = 4
Step 3: Write the ratio
Required ratio = 6 : 4 = 3 : 2
Answer: 3 : 2
To get 68% milk in the final mixture, the two mixtures should be mixed in the ratio 3:2 (First bottle : Second bottle).
This problem uses the alligation method, which is especially useful when dealing with mixtures and average values. It's commonly tested in aptitude exams and helps in understanding the efficiency of ratio-based reasoning in real-world problems.
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