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Math Inequalities

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One canned juice drink is 25% orange juice another is 5% orange juice. How many liters of each should be mixed together in order to get 20L that is 24% orange juice?

How many liters of the 25% orange juice should be in mixture?

How many liters of the 5% orange juice should be in mixture?


How can I solve this problem, or what is the best method??

  • Math Inequalities -

    Let V be the volume of the 25% orange juice.

    Since the total volume is 20 l, the volume of 5% orange juice is (20-V).

    The resulting mixture is 24%, therefore

    25%*V + 5%*(20-V) = 24%*20
    Can you solve for V? (It is a whole number close to 20).

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