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Posted by on Monday, May 16, 2011 at 5:58am.

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 - , Monday, May 16, 2011 at 7:20am

    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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