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Three grades of milk are \(1\) percent, \(2\) percent, and \(3\) percent fat by volume. If \(x\) gallons of the \(1\) percent grade, \(y\) gallons of the \(2\) percent grade, and \(z\) gallons of the \(3\) percent grade are mixed to give \(x+y+z\) gallons of a \(1.5\) percent grade, what is \(x\) in terms of \(y\) and \(z?\)
A. \(y+3z\)
B. \(\dfrac{y+z}4\)
C. \(2y+3z\)
D. \(3y+z\)
E. \(3y+4.5z\)
[spoiler]OA=A[/spoiler]
Source: GMAT Prep
A. \(y+3z\)
B. \(\dfrac{y+z}4\)
C. \(2y+3z\)
D. \(3y+z\)
E. \(3y+4.5z\)
[spoiler]OA=A[/spoiler]
Source: GMAT Prep
