What adds to 12 but multiplies to 9

The table shows the distance traveled over time while traveling at a constant speed.

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

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?