Correct Answer: 5
Explanation:
Given:
Let x = liters of mixture to be replaced with pure wine.
After removing x liters of mixture:
We replace x liters with pure wine, so total wine becomes:
Now, new mixture = 40 liters and new wine quantity = 8 + (4x / 5)
Set up the equation:
(8 + 4x / 5) / 40 = 30 / 100 = 3 / 10
Step-by-step calculation:
(8 + 4x/5) / 40 = 3 / 10 => (8 + 4x/5) = 12 => 4x/5 = 4 => x = 5
Answer: 5 liters of mixture should be replaced with pure wine.
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