A research team conducted a study to analyze the impact of different study methods on student performance. They gathered data from 150 students who used one of three study methods: Method A (self-learning), Method B (group study), and Method C (online courses). The final scores (out of 100) of students in each method are summarized below:

• Method A: 82, 75, 88, 90, 70
• Method B: 85, 78, 80, 92, 76
• Method C: 78, 84, 80, 76, 82

Based on the data collected, what is the average score for each study method?