Tyler finds an expression v(x) for that gives the volume of a open-top box in cubic inches in terms of the length x in inches of the cutout squares used to make it.

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