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    Question

    A 50-litre mixture contains milk and water in the ratio

    3:2. How much water should be added to make water 80% of the final mixture?
    A 90 litres Correct Answer Incorrect Answer
    B 100 litres Correct Answer Incorrect Answer
    C 80 litres Correct Answer Incorrect Answer
    D 120 litres Correct Answer Incorrect Answer

    Solution

    80% water means 20% milk.
    Milk = 50 ├Ч 3/5 = 30 litres
    New mixture = 30 ├╖ 0.2 = 150 litres
    Water in new mixture = 150 тАУ 30 = 120 litres
    Old water = 50 тАУ 30 = 20 litres
    Water to be added = 120 тАУ 20 = 100 litres

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