1. **State the problem:** We need to find how many students are in exactly one committee based on the Venn diagram data. 2. **Identify the numbers for exactly one committee:** These are the numbers in each circle but not in any intersection. - Prom only: 4 - Awards only: 6 - Field Day only: 8 3. **Sum these values:** $$4 + 6 + 8 = 18$$ 4. **Conclusion:** There are 18 students who are in exactly one committee.