SOLUTION: It has been recorded that the average number of errors in a newspaper is 4 mistakes per page. What is the probability of having 1 or 2 errors per page?

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Question 386729: It has been recorded that the average number of errors in a newspaper is 4 mistakes per page. What is the probability of having 1 or 2 errors per page?
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
P%281%29+%2B+P%282%29+=+e%5E%28-4%29%284%5E1%2F1%21+%2B+4%5E2%2F2%21%29+=+0.21979, to five decimal places. (This is by use of the Poisson probability distribution.)