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19 March, 09:25

At a convention there are 7 mathematics instructors, 5 computer science instructors, 3 history instructors, and 4 english instructors. If an instructor is selected, find the probability of getting a computer science instructor or a mathematics instructor

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  1. 19 March, 09:28
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    12/19.

    Step-by-step explanation:

    There are 19 instructors altogether.

    Probability (getting a computer science instructor) = 5/19.

    Probability (getting a mathematics instructor) = 7/19.

    As this a 'compounded or' probability these values are added so the answer is 5/19 + 7/19

    = 12/19.
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