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Mathematics, 18.10.2019 21:00 payshencec21
The length of life of an instrument produced by a machine has a normal distribution with a mean of 12 months and standard deviation of 2 months. find the probability that an instrument produced by this machine will last a) less than 7 months b) between 7 and 12 months.
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The length of life of an instrument produced by a machine has a normal distribution with a mean of 1...
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