Let X₁ and X₂ Be 0 - 1 Variables Whose

question 48

Multiple Choice

Let x₁ and x₂ be 0 - 1 variables whose values indicate whether projects 1 and 2 are not done or are done. Which answer below indicates that project 2 can be done only if project 1 is done?

• A) x₁ + x₂ = 1
• B) x₁ + x₂ = 2
• C) x₁ − x₂ ≤ 0
• D) x₁ − x₂ ≥ 0

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