Seth, Warren, Daniel and David participated in a Social Studies quiz. The average number of points scored by Seth and Warren was 76. The average number of points scored by Warren and David was 70.3. The average number of points scored by Seth, Warren and David was 72. The average number of points scored by Daniel and David was 68. How many points did each of them score?

1. David
2. Seth
3. Warren
4. Daniel

(a)
Total score of Seth and Warren
= 76 x 2
= 152

Total score of Warren and David
= 70.3 x 2
= 140.6

Total score of Seth, Warren and David
= 72 x 3
= 216

David's score
= 216 - 152
= 64

(b)
Seth's score
= 216 - 140.6
= 75.4

(c)
Warren's score
= 140.6 - 64
= 76.6

(d)
Total score of Daniel and David
= 68 x 2
= 136

Daniel's score
= 136 - 64
= 72

Answer(s): (a) 64; (b) 75.4; (c) 76.6; (d) 72