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Math Help - Bumping probability

  1. #1
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    Bumping probability

    If Juanita bumps into Troy in the hallway between periods 2 and 3, there is a 25% chance that she will be late. If she does not bump into Troy, she will make it to class on time. If there is a 20% chance that Juanita will bunp into Troy. How likely it is that she will be late on any given day?

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  2. #2
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    There is a \frac{1}{5} chance that she will hit Troy and then a \frac{1}{4} chance that she will actually be late.

    So multiply \frac{1}{4} \cdot \frac{1}{5} = \frac{1}{20}
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  3. #3
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    Quote Originally Posted by Runes View Post
    If Juanita bumps into Troy in the hallway between periods 2 and 3, there is a 25% chance that she will be late. If she does not bump into Troy, she will make it to class on time. If there is a 20% chance that Juanita will bunp into Troy. How likely it is that she will be late on any given day?

    Thank u
    (.2)(.25) Just multiply them they are independent events.
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