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Normally distributed with a mean

Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15.

Find the probability that a randomly selected adult had an IQ greater than 131.5 (the requirement for membership in the Mensa organization). Round to the nearest thousandth.

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## Q : Randomly selected components

Suppose that the lengths of the slots are normally distributed with a mean of 1002.5 mm and a standard deviation of .4 mm. What proportion of the time wil lfour randomly selected components be able to fit into the slot?