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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 129.7-cm and a standard deviation of 2:2-cm.

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 129.7-cm and a standard deviation of 2:2-cm. For shipment, 28 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is less than 130.7-cm. P(M

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