Mathematics, 17.07.2019 11:00, ilarheab
The number of pages in the books in a library follow a normal distribution. the mean number of pages in a book is 150 with a standard deviation of 30. if the library has 500 books, how many of the books have less than 180 pages.
Answers: 1
= 30, using the normal distribution to get the answer is just using Z. So, what we need is P(X<180). ![Z= \frac{x-E[X]}{\sigma } = \frac{180-150}{30} = \frac{30}{30} = 1](/tpl/images/0099/9020/e24e3.png)
(1) = 0.8413. 
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The number of pages in the books in a library follow a normal distribution. the mean number of pages...
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