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    Cell phone probability analysis

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    According to an article appearing in the Wall Street Journal, about 70% of all U.S. households have a cellular phone. suppose that you are conducting a survey of customer satisfaction regarding their cellular phone. If you called 11 households selected at random, what is the probability that:

    (a) every household has a cellular phone?
    (b) more than four households have a cellular phone?
    (c) fewer than 5 do not have a cellular phone?
    (d) more than 7 do not have a cellular phone?

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    https://brainmass.com/statistics/probability/cell-phone-probability-analysis-68135
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