Question: Project 3 can be selected only if both Projects 1 and 2 are selected, but if both Projects 1 and 2 are selected, Project 3
Project 3 can be selected only if both Projects 1 and 2 are selected, but if both Projects 1 and 2 are selected, Project 3 doesnt have to be selected. The appropriate constraint would be
x3>=x1+x2
x1+x2>=x3
x1>=x3 and x2>=x3
x1+x2+x3<=2
None of the above
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