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Probability Math

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Through a mix up on the production line, 5 defective light bulbs were shipped out with 32 good ones. If 4 are selected at random, what is the probability that at least 3 of them are defective?

  • Probability Math -

    This typically calls for the hypergeometric distribution, which gives


    N=total 32+5=37 light bulbs
    n=sample size of 4
    r=defective out of N, 5
    y=number of defective in the sample
    Total P(3+)=5120/435897=1.17%

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