Probability I: Introductory Ideas

A grocery store is reviewing its restocking policies and has analyzed the number of half-gallon containers of orange juice sold each day for the past month. The data are given below.

1. What is the probability that on a randomly selected day the number of cartons of orange juice sold in the evening is between 80 and 99?
2. What is the probability that 39 or fewer cartons were sold during a randomly selected afternoon?
3. What is the probability that either 0-19 or 100 or more cartons were sold in a randomly selected morning?

Solution