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A.
y ≥ 0, y ≥ x and y + x ≤ 4
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B.
y ≤ x, y + x ≤ 4
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C.
y + x ≥ 4, y ≤ x
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D.
y ≤ x, y + x ≤ 4 and y ≥ 0
Correct Answer: Option D
Explanation
y = x implies y ≤ x
y + x = 4 implies y = 4 – x
∴y = 4 – x
∴y ≤ x, y + x ≤ 4 and y ≥ 0
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