by inspection , 15 is the average of 20 and 10
... so, equal amounts of the two
with algebra ... .20 x + .10(1200 - x) = .15 * 1200
A dairy farmer wants to mix a
20%
protein supplement and a standard
10%
protein ration to make
1200
pounds of a high-grade
15%
protein ration. How many pounds of each should he use?
1 answer
1 answer