Find the mean of the given data set.
1. 15, 33, 30, 50, 0
2. -4, 25, -4, 11, 19, 4
3. 4.7, 5.6, 2.5, 4.9, 7.3, 4.7, 5.6, 6.5
4. -10, 0, 3, 3, 6, 16
5. 150, 330, 300, 500, 0
6. 0, 0, 0, 100, 100, 100
7. 50, 50, 50, 50, 50, 50, 50
8. 30, 40, 50, 50, 60, 70
9. 30, 40, 50, 50, 60, 70
10. A student scores 80, 90, and 70 on three exams. Find the weighted mean of the student's three scores, where the score of 80 counts 10 percent, the score of 90 counts 30 percent, and the score of 70 counts 60 percent.