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Lisa has collected data to find that the number of pages per book on a book shelf has a normal distribution. What is the probability

Lisa has collected data to find that the number of pages per book on a book shelf has a normal distribution. What is the probability that a randomly selected book has fewer than 144 pages if the mean() is 186 pages and the standard deviation() is 21 pages? Use the empirical rule.Enter your answer as a percent rounded to two decimal places if necessary.

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