Mathematics, 08.07.2021 18:20 leshayk91
The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a bulb is 500 hours. Find the probability of a bulb lasting for between 480 and 526 hours.
Answers: 3
hours
hours
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The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours...
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