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ATQ, After removing 'M' litres of mixture, let quantity of milk and water left be 6x litres and 4x litres, respectively. According to the question, 6x - 4x = 50 Or, 2x = 50 Or, 'x' = 50 / 2 = 25 Therefore, after removal of 'M' litres of mixture, quantity of mixture left = 6x + 4x = 10x = 10 × 25 = 250 litres Therefore, 'M' = 300 - 250 = 50
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