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28 April, 18:41

The mathematics faculty at a college consists of 11 professors, 55 associate professors, 11 assistant professors, and 55 instructors. If one faculty member is randomly selected, find the probability of choosing a professor or an instructor.

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  1. 28 April, 18:58
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    P (PorI) = (11+55) / (11+55+11+55)

    P (PorI) = 66/132

    P (PorI) = 1/2
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