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Mathematics, 07.03.2020 05:25 CrusaderLord
6. The length of life of an instrument produced by a machine has a normal ditribution 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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6. The length of life of an instrument produced by a machine has a normal ditribution with a mean of...
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