Rodrigo and Edna are divorced. They are sitting at a circular table with n 2 chairs

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Rodrigo and Edna are divorced. They are sitting at a circular table with n ≥ 2 chairs altogether, and all seating arrangements are equally likely. What is the probability that they are not sitting next to each other?
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Introduction to Probability

ISBN: 978-0716771098

1st edition

Authors: Mark Daniel Ward, Ellen Gundlach

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