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    Question

    120 litres mixture (milk + water) contains 36 litres water.

    Find the quantity of mixture that must be removed so that quantity of milk becomes 42 litres in the mixture.
    A 60 litres Correct Answer Incorrect Answer
    B 55 litres Correct Answer Incorrect Answer
    C 65 litres Correct Answer Incorrect Answer
    D 50 litres Correct Answer Incorrect Answer
    E 70 litres Correct Answer Incorrect Answer

    Solution

    Initial quantity of milk = 120 - 36 = 84 litres
    Ratio of quantity of milk and water respectively = 84:36 = 7:3
    Let the required quantity of mixture be 'y' litres.
    So, 84 - (7y/10) = 42
    Or, (7y/10) = 42
    Or, 'y' = 60

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