20 people are seated around a circular table. In how many ways can the – InterviewSolution

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1.	20 people are seated around a circular table. In how many ways can they all simultaneously be shaking hands with others in the table, so that none of the arms cross each other.
Answer» 20 people are seated around a circular table. In how many ways can they all simultaneously be shaking hands with others in the table, so that none of the arms cross each other.

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