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The feasible region for an LPP is shown by shaded region in the figure. Then the minimum value of Z = 11x + 7y is

Figure for CUET Mathematics 2025 29 May Shift 2 question 60 (Algebra)

Solution

✅ Correct Option: 1

In Linear Programming Problems (LPP), the minimum or maximum value of the objective function occurs at one of the corner points of the feasible region.

From the graph, the corner points of the shaded feasible region are:

Point A: (0,3)(0, 3)

Point B: (3,0)(3, 0)

Point C: (0,6)(0, 6)


Evaluating Z=11x+7yZ = 11x + 7y at each corner point:

At point A: (0,3)(0, 3)

Z=11(0)+7(3)Z = 11(0) + 7(3)

Z=0+21Z = 0 + 21

Z=21Z = 21


At point B: (3,0)(3, 0)

Z=11(3)+7(0)Z = 11(3) + 7(0)

Z=33+0Z = 33 + 0

Z=33Z = 33


At point C: (0,6)(0, 6)

Z=11(0)+7(6)Z = 11(0) + 7(6)

Z=0+42Z = 0 + 42

Z=42Z = 42


Comparing the values:

  • At point A: Z=21Z = 21
  • At point B: Z=33Z = 33
  • At point C: Z=42Z = 42

Therefore, the minimum value of Z=21Z = 21

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