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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 129.2- cm and a standard deviation of

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 129.2- cm and a standard deviation of 1.1-cm. For shipment, 6 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is less than 129.8-cm. P(M

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