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For a brand, the life of light bulbs (b) are normally distributed
with a mean of 750 hours and a standard deviation of 75
hours. Find the probability that a given light bulb lasts
between 675 and 900 hours.
99.7%-
95%
68%
525 600 675 750 825 900 975
P(675 Be sure to use the 68% - 95% -99.7% rule and do not round.
Enter
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For a brand the life of light bulbs b are normally distributed with a mean of 750 hours and a standard deviation of 75 hours Find the probability that a given l class=


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