A bank gets an average of 8.5 customers per hour. Assume the variable follows a Poisson distribution. Find the probability that there will be 4 or more customers at this bank in one hour. (That is, find P(X4) (round to 4 decimal places)

Suppose a random variable, x, follows a Poisson distribution. Let =2.5 every minute, find the P(X=125) over an hour. Round answer to 4 decimal places. Answer:

The mean number of visitors at a national park in one weekend is 55. Assume the variable follows a Poisson distribution. Find the probability that there will be at most 49 visitors at this park in one weekend. (That is, find P(X49)) (round to4 decimal places) Answer:

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