demoskopico
01-13-2008, 12:48 PM
Three grades of mlk are 1%,2% and 3% fat by volume. If x gallons of the 1% grade, y gallons of the 2% grade, and z gallons of the 3% grade are mixed to give x+y+z gallons of a 1.5% grade, what is x in terms of y and z?
A. y+3z
B. (y+z)/4
C. 2y+3z
D. 3y+z
E. 3y+4.5z
A. y+3z
B. (y+z)/4
C. 2y+3z
D. 3y+z
E. 3y+4.5z