Question
For the linear programming problem Maximize z = x1 + 2x2 + 3x3 - 4x4 Subject to 2x1 + 3x2 - x3 - x4 = 15 6x1 + x2 + x3 - 3x4 = 21 8x1 + 2x2 + 3x3 - 4x4 = 30 x1, x2, x3, x4 ≥ 0, x1 = 4, x2 = 3, x3 = 0, x4 = 2 is
Answer: Option D
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