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Wednesday, March 12, 2008

Mixture Problem 3

Elaine has 2 grades of coffee. She has a grade thats worth $3 a pound and another worth $5 a pound. She has 10 pounds of the $3 grade coffee. How many pounds of the $5 grade of coffee must she mix to get her ideal coffee which will sell based on grade at $4.50 per pound?

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