Can someone help me with this. Will Mark brainliest. Need answer and work/explanation. Thank you.

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

Can someone me out here and the tell me the greatest common factor

Write the rational number in lowest terms 99/-15