1. **Problem Statement:** Find the total number of students in the senior class based on the Venn diagram data. 2. **Given Data:** - Drama only: 38 - Band only: 51 - Athletics only: 137 - Drama & Band only: 30 - Drama & Athletics only: 4 - Band & Athletics only: 8 - Drama & Band & Athletics (all three): 10 - Outside all activities: 67 3. **Formula:** Total students = Sum of all individual groups + those outside all groups 4. **Calculation:** Total = 38 (Drama only) + 51 (Band only) + 137 (Athletics only) + 30 (Drama & Band) + 4 (Drama & Athletics) + 8 (Band & Athletics) + 10 (all three) + 67 (none) 5. **Simplify:** Total = 38 + 51 + 137 + 30 + 4 + 8 + 10 + 67 Total = 345 **Final Answer:** There are **345** students in the senior class.