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When determining the leaving variable in transportation model, you obtain the following values for variables $x_{11},x_{22}$ and $x_{34}$ :

$x_{11}=10-$

$x_{22}=15-$

$x_{34}=10-$

Which of the above variables is the leaving variable?

Your answer:

$x_{22}$ is the leaving variable.

Either $x_{11}$ or $x_{34}$ is the leaving variable.

Both $x_{22}$ and $x_{34}$ are the leaving variables.

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