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At a party with 5 married couples, no person shakes hands with his or her spouse. Of the 9 people other than the host, no 2 shake hands with the same number of people. With how many people does the hostess shake hands? Explain your answer. (4 points) Now suppose there are n married couples at the party; no person shakes hands with his or her spouse, and the 2n − 1 people other than the host shake hands with different numbers of people. With how many people does the hostess shake hands? Explain your answer.

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(Top Tutor) Daniel C.
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School: Carnegie Mellon University
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