jujupacheco830 jujupacheco830

22-01-2023
Mathematics

contestada

In a city library, the mean number of pages in a novel is 525 with a standard deviation of 200.
Furthermore, 30% of the novels have fewer than 400 pages. Suppose that you randomly select 50 nov from the library.

What is the probability that at least 20 of the novels have fewer than 400 pages?

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