Question

13) 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 1

B) 180 pounds

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 .