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Posted by on Wednesday, October 19, 2011 at 12:44am.

Five percent of all items sold by mail order company are returned by customers for a refund. Find the probability that, of two items sold during a given hour by this company,
a) both will be returned for a refund
b) neither will be returned for a refund

  • statistics - , Wednesday, October 19, 2011 at 2:30am

    The probability of both/all events occurring is found by multiplying the probabilities of the individual events.

    a) .05*.05 = ?

    b) (1-.05)(1-.05) = ?

  • statistics - , Saturday, January 31, 2015 at 10:50am

    a) 0.0025
    b)0.9025

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