in a city mean number of days in July with 0.01 inch or more precipitation is 16. What is the probability that the city has 20 days with 0.01 inch or more precipitation next July?

Question

anonymous · Answer

i can't seem to figure out what to do. im supposed to decide or tell what distribution this is from these 3: Bionmial,geometric, poisson. If anyone can help ill appreciate it

anonymous · Answer

$$\Large P(X) = \frac{e^{- \mu} \mu^{x}}{x!}$$

You know your mean.  Just plug in $x$, which is 20.