Find out the indicated probabilities using geometric distribution or Poisson distribution. The find if the events are unusual. If convenient use a Poisson probability table or technology to the probabilities.
A newspaper finds out that the mean number of errors per page is eight. Find out the probability that (a) exactly four typographical errors are found on the page, (b) at most four typographical errors are found per page, (c) more than four typographical errors per page are found.
(A) P( exactly four typographical errors are found on a page)
(B) P(at most four typographical errors are found per page)
(C) P(more than four typographical errors per page are found)