Question: Let X1 and X2 be binary variables whose values indicate whether projects 1 and 2 are selected or not. Which answer below models a situation

Let X1 and X2 be binary variables whose values indicate whether projects 1 and 2 are selected or not. Which answer below models a situation in which project 1 or 2 must be selected, but not both? Question 5 options: X1 + X2 = 1 X1 +X2 1 X1 X2 X1 + X2 1

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