PLEASE HELP I need an explanation please if not thanks anyway

Asap 25 pts + brainliest to right/best answer

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Ineed i been stuck on this question since yesterday