Question: The constraint (x1 + x2 + x3 + x4 = 2) means that out of the projects must be selected. Assume that we

The constraint (x1 + x2 + x3 + x4 = 2) means that ________ out of the ________ projects must be selected. Assume that we are using 0-1 integer programming model to solve a problem and xj = 1 if project j is selected and xj = 0, otherwise.

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The constraint X1 + X2 + X3 + X4

Content Area The constraint x1 + x2 + x3 + x4

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