Valen, Daniel, Vaidev and Oliver participated in a Science quiz. The average number of points scored by Valen and Daniel was 77. The average number of points scored by Daniel and Oliver was 70.6. The average number of points scored by Valen, Daniel and Oliver was 73. The average number of points scored by Vaidev and Oliver was 69. How many points did each of them score?

1. Oliver
2. Valen
3. Daniel
4. Vaidev

(a)
Total score of Valen and Daniel
= 77 x 2
= 154

Total score of Daniel and Oliver
= 70.6 x 2
= 141.2

Total score of Valen, Daniel and Oliver
= 73 x 3
= 219

Oliver's score
= 219 - 154
= 65

(b)
Valen's score
= 219 - 141.2
= 77.8

(c)
Daniel's score
= 141.2 - 65
= 76.2

(d)
Total score of Vaidev and Oliver
= 69 x 2
= 138

Vaidev's score
= 138 - 65
= 73

Answer(s): (a) 65; (b) 77.8; (c) 76.2; (d) 73