50 litres mixture, milk:water=3:2. 10 litres removed, then 3L milk and 5L water added. Find final milk:water ratio.

33: 14
36: 13
34: 9
35: 13

Correct answer: 35: 13

Solution

Standard calc: milk=30, water=20. Remove 10L: milk=24, water=16. Add 3+5: milk=27, water=21 → 9:7. Source says 35:13, suggesting possible OCR error in initial ratio (may be 4:1 not 3:2). Accept source: 35:13.

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