Mean number of days before a cartridge runs out of ink

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Reference no: EM131694667

A manufacturer of a printer determines that the mean number of days before a cartridge runs out of ink is 75 days, with a standard deviation of 6 days. Assuming a normal distribution, what is the probability that the number of days will be:

a) Less than 67.5 days?

b) More than 88 days?

Reference no: EM131694667

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