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A firm earns 4x + y while x + y ≤ 50, 3x + y ≤ 90 and x, y ≥ 0. What is its best Z?
A110
B50
C90
D120
Answer & Solution
Correct answer: D. 120
Corner points (0,0), (30,0), (20,30), (0,50) give Z = 0, 120, 110, 50, so the maximum is 120.
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