Mary will make punch that is 25% fruit juice by adding pure fruit juice to a 2-liter mixture that is 10% pure fruit juice. How many liters of pure juice does she need to add?
问道数学题?谢谢!
Mary will make punch that is 25% fruit juice by adding pure fruit juice to a 2-liter mixture that is 10% pure fruit juice. How many liters of pure juice does she need to add?
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.4
-britannica-
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07/14/2008 postreply
13:00:21
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how to get 0.4?
-恰好-
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07/14/2008 postreply
13:02:00
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2*(1-10%)/(1-25%)-2
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07/14/2008 postreply
13:03:11