Question: Let x i = 1 if Project i is selected, i = 1,2,3,4,5; and 0 otherwise: Which answer below indicates that if Project 3 is
Let xi = 1 if Project i is selected, i = 1,2,3,4,5; and 0 otherwise:
Which answer below indicates that if Project 3 is selected, then Project 1 must also be selected?
A. x1 x3
B. x3 + x1 = 1
C. x3 + x1 1
D. x3 x1
E. None of the above
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