Two Constraints in a Model with Binary Variables Y₁, Y₂ $\le$

question 36

Multiple Choice

Two constraints in a model with binary variables Y₁, Y₂, Y₃ representing whether or not project 1, 2, or 3 will be performed are: Y₁ - Y₂ $\le$ 0 and Y₁ - Y₃ $\le$ 0.Taken together, what can be inferred from these constraints?

• A)Projects 2 and 3 cannot both be performed.
• B)Projects 2 and 3 must be performed if project 1 is performed.
• C)Projects 2 and 3 may be performed is project is performed.
• D)Project 1 must be performed.

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