Middle School

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A merchant has coffee worth $60 a pound that she wishes to mix with 90 pounds of coffee worth $90 a pound to get a mixture that can be sold for $70 a pound. How many pounds of the $60 coffee should be used?

A. 270 pounds
B. 180 pounds
C. 90 pounds
D. 135 pounds

Answer :

Answer:

B) 180 pounds

Step-by-step explanation:

if the mixture is in the ratio 1:1 the new mixture would cost $75

but we want a price of $ 70 so the ratio should be 2:1 that is 2 units of 60 $ coffee and 1 unit of 90$ coffee. this would give 70$ cost price .

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