Answer:
5/9
Step-by-step explanation:
Each number - 0 through 8 - has an equal probability of being the number of sales on a particular day.
There are 9 possibilities of equal likelihood, so each one has a probability of 1/9.
So we want the probability of the number of sales being 4, 5, 6, 7, or 8.
Those are 5 out of the 9 possibilities, so 5(1/9) = 5/9.
