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27 October, 05:25

A factory produced 5,000 light bulbs. The manager selects a random sample of 120 light bulbs to check for defects. He finds that 3 light bulbs are defective. How many light bulbs out of 5,000 should the manager predict to be defective?

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  1. 27 October, 05:42
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    Total number of bulbs produced=5000

    total number of samples=120

    number of defective=3

    Probability that a bulb selected at random is defective will be:

    3/120=0.025

    The total number of bulbs that could be defective out of 5000 bulbs produced will be:

    5000 (0.025) = 125 bulbs
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