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In job assignment problem m jobs will be assigned to n people, but not all people...

In job assignment problem m jobs will be assigned to n people, but not all people are qualified for all jobs. And each job should be filled by exactly one person and each person will be assigned to one job at least. Propose a discrete structure model that can be used to model this problem. what is the relation between n and m?. Justify your answer in details.

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