Let X₁ , X₂ , and X₃ Be 0 -

question 26

Multiple Choice

Let x₁ , x₂ , and x₃ be 0 - 1 variables whose values indicate whether the projects are not done (0) or are done (1) . Which answer below indicates that at least two of the projects must be done?

• A) x₁ + x₂ + x₃ ≥ 2
• B) x₁ + x₂ + x₃ ≤ 2
• C) x₁ + x₂ + x₃ = 2
• D) x₁ − x₂ = 0

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