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24 January, 22:24

A bin contains 72 light bulbs of which 10 are defective. If 5 light bulbs are randomly selected from the bin with replacement, find the probability that all the bulbs selected are good ones. Round to the nearest thousandth if necessary. (Hint: sampling with replacement = independent events)

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  1. 25 January, 00:42
    0
    0.4735

    Step-by-step explanation:

    10 defective, 62 not defective

    P (good) = 62/72 = 31/36

    All 5 good:

    (31/36) ⁵ = 0.4734738145
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