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The U.S. Census Bureau reported 77% of the U.S population had internet access in 2009. Choosing 3 random individuals find the probability that
a. none of the 3 inidivuals has internet

b. all of the individuals have internet access

c. at least 1 of the 3 individuals has internet access

  • statistics - ,

    .77 have it so .23 don't

    None of the 3 have it.

    (.23)^3

    All have it.

    (.77)^3


    At least 1 has it means that 1, 2 or 3 have it. It is easier to do the problem in the reverse. If at least 1 has it, the opposite would be none have it. (.23^3)

    1 - (.23)^3

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