SOLUTION: Suppose that, on average, in every two pages of a book there is one typographical error, and that the number of typographical errors on a single page of the book is a Poisson rand

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Question 1138564: Suppose that, on average, in every two pages of a book there is one typographical error, and that the
number of typographical errors on a single page of the book is a Poisson random variable with a mean of
½. What is the probability of at least one error on a certain page of the book?

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Find the probability of 0 errors, and everything else is at least 1 error.
P(0) is e^(-0.5)*0.5^1/1!=0.303
The answer is 1-0.303=0.697