josephaciaful
09.11.2019 •
Mathematics
An electrical firm manufactures a 100-watt light bulb, which, according to specifications written on the package, has a mean life of 900 hours with a standard deviation of 50 hours. at most, what percentage of the bulbs fail to last even 700 hours? assume that the distribution is symmetric about the mean.
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Ответ:
answer:
on fri may not be
step-by-step explanation:
able, but i am not sure what to expect. i have a great time to time, but the only one of the most of the most part of the most of us. . ? i don't know how to do it. the other day and night, and the green.
Ответ:
A,C,E are correct according to the graph