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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 146.9-cm and a standard deviation of 0.6-cm.

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 146.9-cm and a standard deviation of 0.6-cm. For shipment, 26 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 146.8-cm and 147.1-cm. P(146.8-cm

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