The stem-and-leaf plot shows the ages of a group of friends. Find the median age.

Stem Leaf
2
8
3
124
4
279
5
4
Key: 28 = 28 years

To find the median age, we need to first arrange the ages in ascending order.

The ages are: 24, 24, 31, 38, 39, 40, 45

Since there are 7 ages, the median will be the 4th age when arranged in ascending order.

Therefore, the median age is 38 years old.