Ryan, Oscar, Valen and Elijah participated in a Mathematics quiz. The average number of points scored by Ryan and Oscar was 77. The average number of points scored by Oscar and Elijah was 71.5. The average number of points scored by Ryan, Oscar and Elijah was 73. The average number of points scored by Valen and Elijah was 65. How many points did each of them score?

1. Elijah
2. Ryan
3. Oscar
4. Valen

(a)
Total score of Ryan and Oscar
= 77 x 2
= 154

Total score of Oscar and Elijah
= 71.5 x 2
= 143

Total score of Ryan, Oscar and Elijah
= 73 x 3
= 219

Elijah's score
= 219 - 154
= 65

(b)
Ryan's score
= 219 - 143
= 76

(c)
Oscar's score
= 143 - 65
= 78

(d)
Total score of Valen and Elijah
= 65 x 2
= 130

Valen's score
= 130 - 65
= 65

Answer(s): (a) 65; (b) 76; (c) 78; (d) 65