Answer :
The error message displayed in Excel Solver when attempting to solve an unbounded problem is option (b): "Solver could not find a bounded solution."
When using Excel Solver, an unbounded problem refers to a situation where the objective function can be increased or decreased indefinitely without violating any constraints. In other words, there is no finite solution that optimizes the objective function.
In such cases, when Solver attempts to find a solution for an unbounded problem, it displays the error message "Solver could not find a bounded solution." This message indicates that Solver was unable to find a feasible and bounded solution within the defined constraints.
The error message helps alert the user that the problem they are trying to solve does not have a finite optimal solution. It suggests that there may be issues with the model formulation or the constraints defined in the Solver setup.
To address this error, the user needs to review and revise the model and constraints to ensure that the problem is well-defined and has feasible and bounded solutions. They may need to reconsider the objective function, adjust constraints, or introduce additional constraints to make the problem solvable within defined boundaries.
In conclusion, option (b) "Solver could not find a bounded solution" is the correct error message displayed in Excel Solver when attempting to solve an unbounded problem.
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