Kirk has 12 dollars less than jim if jim spends half of his money and kirk spends none then kirk will have two dollars more than jim how much money did they both start with

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