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15 tv were shipped 4 were defective if 2 tv's were random selected compute the possibility of both tv's working and the probability that at least one of the 2 tv does not work

  • math -

    If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

    11/15 * 11/15 = ?

    That means one or both do not work.

    One not work = 4/15 * 11/15 = ?

    Both not work = 4/15 * 11/15 = ?

    Either-or probabilities are found by adding the individual probabilities.

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