From the given Venn diagram, we can interpret the following:
- The total number of girls is 15.
- The total number of players is 30.
- The total number of coaches is 17.
- The total number of players and girls together is 16, as the intersection of the two sets.
- The total number of players, coaches, and girls is the sum of those who belong to the intersection of all three sets.
Thus, the total number of players, girls, and coaches is \( \boxed{16} \).