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Mathematics, 07.03.2020 01:43 sayrieee

If a publisher of nontechnical books takes great pains to ensure that its books are free of typos, so that the probability of any given page containing at least one such error is .005 & errors are independent from page to page. What is the probability that:
(a) One of its 400-page novels will contain exactly 1 page with errors? (b) At most three pages are with errors.

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