A garden store sells Kentucky bluegrass seed for $6 per pound and ryegrass seed for $3 per pound. How much rye must be mixed with 180 pounds of bluegrass to obtain a blend that will sell for $5 per pound?
A. 90 lb
B. 60 lb
C. 80 lb
D. 105 lb
E. 70 lb
Answer: A
Mathematics
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