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Consider the following linear programming problem :

$\max. z = 0.50 x_{2} – 0.10x_{1}$

Subject to the constraints

$2x_{1} + 5x_{2} \leq 80$

$x_{1} + x_{2} \leq 20$

and $x_{1}, x_{2} \geq 0$

The total maximum profit $(z)$ for the above problem is :

1. $6$
2. $8$
3. $10$
4. $12$
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ans is B

selected