Anumber x multiplied by 3/8 is 5/12

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

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