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8 June, 11:19

A bin contains 64 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.

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  1. 8 June, 11:42
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    Total number of bulbs = 64

    Number of defective bulbs = 10

    Number of good bulbs = 64 - 10 = 54

    P (5 good bulbs) = (54/64) ⁵ = (27/32) ⁵ = 0.428

    Answer: 0.428
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