Cars are arriving at a toll booth at a rate of 4 per minute, what is the probabiulity that exactly 8 cars will arrive in the next two minutes

Do you work for the Thruway Authority or is this homework?

If it is the latter, post your attempt please.

The OP seems to have fled the scene (not surprising given the turnover rate at the Thruway Authority :p).

Anyway, I feel like I'm missing something. The problem states that the cars arrive at a rate of 4 per minute. It doesn't say an average of 4 per minute; it doesn't give a variance or standard deviation. It just says flat out 4 per minute. Barring any other information and the use of the word "rate", which I interpret to mean that a car arrives every 15 seconds, it seems to me that there's a 100% chance that exactly 8 cars will arrive in the next two minutes. Jerry? Any thoughts?

Indeed, there is also a lack of information, unless there is actually not and the answer becomes straightforward. :)

Good. I feel better knowing you agree. LOL! :)

But not me when I can't rep you from v2 :(