Solve the problem.The manager of a coffee shop has one type of coffee that sells for $6 per pound and another type that sells for $14 per pound. The manager wishes to mix 30 pounds of the $14 coffee to get a mixture that will sell for $9 per pound. How many pounds of the $6 coffee should be used?
A. 25 lb
B. 50 lb
C. 80 lb
D. 40 lb
Answer: B
Mathematics
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