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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 187.3-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 187.3-cm and a standard deviation of 0.6-cm. For shipment, 20 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 187.5- cm and 187.7-cm. P(187.5-cm

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