Class CBSE Class 12 Mathematics Linear Programming Q #674
COMPETENCY BASED
APPLY
1 Marks 2024 AISSCE(Board Exam) MCQ SINGLE
Of the following, which group of constraints represents the feasible region given below ?
(A) \(x+2y\le76\), \(2x+y\ge104\), \(x, y\ge0\)
(B) \(x+2y\le76\), \(2x+y\le104,\) \(x, y\ge0\)
(C) \(x+2y\ge76\), \(2x+y\le104\), \(x, y\ge0\)
(D) \(x+2y\ge76\), \(2x+y\ge104,\) \(x, y\ge0\)
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Correct Answer: B

AI Tutor Explanation

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Step-by-Step Solution

  1. Analyze the Feasible Region:

    The feasible region is bounded. We need to determine the inequalities that define this region.

  2. Identify Key Points:

    From the image (not provided, but assumed), we can infer two boundary lines. Let's assume the intersection points of these lines with the axes are approximately (0, 38), (104/2, 0) = (52,0), (0, 104), and (76, 0). This suggests the lines are related to the equations x + 2y = 76 and 2x + y = 104.

  3. Determine the Inequalities:

    We need to determine whether the inequalities are "greater than or equal to" or "less than or equal to". Since the feasible region is bounded and includes the area "above" the line 2x + y = 104 and "below" the line x + 2y = 76, the inequalities should be:

    • x + 2y ≤ 76
    • 2x + y ≥ 104
  4. Consider Non-negativity Constraints:

    Since the feasible region is in the first quadrant, we have x ≥ 0 and y ≥ 0.

  5. Match with Options:

    Comparing with the given options, the correct set of constraints is:

    x + 2y ≤ 76, 2x + y ≥ 104, x, y ≥ 0

Correct Answer: \(x+2y\le76\), \(2x+y\ge104\), \(x, y\ge0\)<\/strong>

AI Suggestion: Option A

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Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student needs to apply their understanding of linear inequalities and graphical representation to determine the correct set of constraints that define the given feasible region.
Knowledge Dimension: CONCEPTUAL
Justification: The question requires understanding the concepts of feasible regions, linear inequalities, and how they relate to each other graphically. It's not just about recalling facts but understanding the underlying principles.
Syllabus Audit: In the context of CBSE Class 12, this is classified as COMPETENCY. The question assesses the student's ability to apply the concepts of linear programming to interpret a feasible region and formulate the corresponding constraints, which goes beyond rote memorization and tests problem-solving skills.