EXAMPLE 9Identifying the most likely value of a discrete random variable

If one of the friends represented in the table in Example 7 is chosen at random, what is the most likely number of credits taken by that friend?

Solution

The largest probability in the probability table is , and the tallest bar in the probability graph (Figure 3) is for , so 15 is the most likely number of credits.

NOW YOU CAN DO

Exercises 45b–52b.