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The mathematics department of a college has 13 male professors, 15 female professors, 11 male teaching assistants, and 7 female teaching assistants. If a person

The mathematics department of a college has 13 male professors, 15 female professors, 11 male teaching assistants, and 7 female teaching assistants. If a person is selected at random from the group, find the probability that the selected person is a professor or a male.

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