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3 July, 10:19

A manufacturing machine has a 7% defect rate. if 5 items are chosen at random, what is the probability that at least one will have a defect? mhf

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  1. 3 July, 10:30
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    30.4%

    Step-by-step explanation:

    Probability that the 5 chosen are not defective = (1 - 0.07) ^5

    = 0.93^5

    = 0.696

    So the probability that there is at least one defective = 1 - 0.696

    = 0.304

    = 30.4 %
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