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A liter of orange fruit drink contains 22% orange juice. How many millimeters of orange juice must be added to produce a mixture containing 50% orange juice?

  • math -

    OJ is not measured in millimeters.

    You probably mean milliliters (ml)

    Your original liter of fruit drink contains 780 ml of water and 220 of OJ. You want to add X ml of OJ so that

    220 + X = (1/2)(1000 + X)
    X/2 = 500 - 220 = 280
    X = 560 ml

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