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
Correct Answer:

Verified
Correct Answer:
Verified
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