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Question

The corner points of the feasible region for an LPP are (0,2), (3,0), (6,0), (6,8) and (0,5). Let Z=4x+6y be the objective function. Then minimum value of Z occurs at

A
(0,2) only
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B
(3,0) only
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C
the mid-point of the line segment joining the points (0,2) and (3,0) only
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D
any point on the line segment joining the points (0,2) and (3,0)
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Solution

The correct option is D any point on the line segment joining the points (0,2) and (3,0)
Corner PointsZ=4x+6y(0,2)4×0+6×2=12(3,0)4×3+6×0=12(6,0)4×6+6×0=24(6,8)4×6+6×8=72(0,5)4×0+6×5=30Since the minimum value of Z=12 occurs at two distinct corner points, (0,2) and (3,0), it occurs at every points of the line segment joining these two points.

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