Eric, Elijah, Mark and Albert participated in a Mathematics quiz. The average number of points scored by Eric and Elijah was 76. The average number of points scored by Elijah and Albert was 71.5. The average number of points scored by Eric, Elijah and Albert was 72. The average number of points scored by Mark and Albert was 67. How many points did each of them score?

1. Albert
2. Eric
3. Elijah
4. Mark

(a)
Total score of Eric and Elijah
= 76 x 2
= 152

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

Total score of Eric, Elijah and Albert
= 72 x 3
= 216

Albert's score
= 216 - 152
= 64

(b)
Eric's score
= 216 - 143
= 73

(c)
Elijah's score
= 143 - 64
= 79

(d)
Total score of Mark and Albert
= 67 x 2
= 134

Mark's score
= 134 - 64
= 70

Answer(s): (a) 64; (b) 73; (c) 79; (d) 70