Solve the problem.The manager of a coffee shop has one type of coffee that sells for $5 per pound and another type that sells for $12 per pound. The manager wishes to mix 60 pounds of the $12 coffee to get a mixture that will sell for $10 per pound. How many pounds of the $5 coffee should be used?
A. 42 lb
B. 24 lb
C. 12 lb
D. 84 lb
Answer: B
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