where e is a mathematical constant approximately equal to 2.71828, x = 0, 1, 2, … is the number successes that you are trying to find the probability for, μ is the mean number of a success over one in...where e is a mathematical constant approximately equal to 2.71828, x = 0, 1, 2, … is the number successes that you are trying to find the probability for, μ is the mean number of a success over one interval of time, space, volume, etc. The “old” would be the original stated mean and units and the “new” is the units from the question.
