*18. The verbal subscale on the SAT (SAT-CR) has a normal distribution with a mean of 500...

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*18. The verbal subscale on the SAT (SAT-CR) has a normal distribution with a mean of 500 and a standard deviation of 100. Consider the roughly one million high school seniors who took the SAT last year. If one of these students is selected at random, what is the probability that his or her SAT-CR score will be:

(a) 460 or higher?

(b) between 460 and 540?

(c) 680 or higher?

(d) as extreme as 680?

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