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When Hiroto is writing, there is 0.92 probability that there will be no spelling mistakes on a page. One day, Hiroto writes an essay that is 11 pages long. Assuming that Hiroto is equally likely to have a spelling mistake on each of the 11 pages, what is the probability that he will have a spelling mistake on at least one of the pages?

 Mar 5, 2020
 #1
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First calculate the probability that he will have no spelling mistakes on any page.  This is p1 = 0.9211.  

 

The probability that he will have at least one spelling mistake is then given by 1 - p1 = 1 - 0.9211 ≈ 0.6004

 Mar 6, 2020

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