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Table 1 This table shows the value given by each individual to each feasible solution that just obtaining this table may be prohibitively costly from a computational point of view, because of the combinatorial nature of the problem. The last row includes the optimal solution F¥ for each individual, which may be obtained solving a knapsack problem, see, e.g., [4]. Clearly, if Ff = FX =--- = FX, this feasible solution is obviously the group decision. However, typically, various