Owen, Jack, Bryan and Lee participated in a Social Studies quiz. The average number of points scored by Owen and Jack was 78. The average number of points scored by Jack and Lee was 71.4. The average number of points scored by Owen, Jack and Lee was 73. The average number of points scored by Bryan and Lee was 69. How many points did each of them score?

1. Lee
2. Owen
3. Jack
4. Bryan

(a)
Total score of Owen and Jack
= 78 x 2
= 156

Total score of Jack and Lee
= 71.4 x 2
= 142.8

Total score of Owen, Jack and Lee
= 73 x 3
= 219

Lee's score
= 219 - 156
= 63

(b)
Owen's score
= 219 - 142.8
= 76.2

(c)
Jack's score
= 142.8 - 63
= 79.8

(d)
Total score of Bryan and Lee
= 69 x 2
= 138

Bryan's score
= 138 - 63
= 75

Answer(s): (a) 63; (b) 76.2; (c) 79.8; (d) 75