Three Grades of milk are 1%, 2% and 3% fat by volume. If x gallons of 1 % grade, Y gallons of 2% and Z gallons of 3% grade are mixed to X+Y+Z galllons of 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+4.5 Z
Solutions???
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Mixture problem, whats the best approach?? GMAT Prep
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.01(x) + .02(y) + .03(z) = .015(x+y+z)blitz28 wrote:Three Grades of milk are 1%, 2% and 3% fat by volume. If x gallons of 1 % grade, Y gallons of 2% and Z gallons of 3% grade are mixed to X+Y+Z galllons of 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+4.5 Z
Solutions???
multiply by 200 to clear decimals:
2x + 4y + 6z = 3(x+y+z)
2x + 4y + 6z = 3x + 3y + 3z
separate the "x"s from the "y"s and "z"s:
y + 3z = x
choose (A)!
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