Babyhands6173 Babyhands6173

13-02-2024
Mathematics

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the lifespan of a batch of lightbulbs is normally distributed with a mean lifespan of 650 days and a standard deviation of 15 days. what is the probability that a randomly selected lightbulb will have a lifespan of between 635 and 680 days? responses
a. 344%
b. 47.5g.5%
c. 68h%
d. 81.5%

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