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5 February, 16:12

For every 144 light bulbs produced, 6 are defective. Find the number of defective light bulbs that could be expected out of 720.

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  1. 5 February, 16:31
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    You are going to get the rate of the detects.

    6 detects : 114 light bulbs = 1/19 detects per light bulb

    If there are 720 light bulbs, then the number of detects will be

    720 light bulbs * 1/19 detects per light bulb = 37. 89 ≈ 38 detects
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