Increased research have focused on the number of illnesses involving the E.Coli,. Sporadic outbreaks of E.coli have occurred in Colorado at a rate of approx. 2.4 per 100,000 for a period of two years.

If this rate hasn't changed and if 100,000 cases were reviewed for the year, what is the probability that at least 5 cases of E.coli will be observed?

Thanks for any help. Im not sure how to do this...