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Assume that there are 7 different issues of Newsweek, 8 different issues of Time, and 4 different issues of Sports Illustrated, including the December 1st issue, on the rack. You choose 4 of them at random.

What is the probability that you choose at least 1 of the Time magazines?

  • Math -

    With no restriction, number of ways to choose 4
    - C(19.4) = 3876

    number of ways to choose 4 with NO Time magazines
    = C(11,4) = 330

    so the number of ways with at least one Time = 3876-330 = 3546

    prob(at least one Time) = 3546/3876 = 591/646 or appr .915

  • Math -

    thank you so much! i appreciate you writing out how to solve it rather than just giving me an answer by itself....def helped me understand

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