Julian, Ahmad, Michael and George participated in a Mathematics quiz. The average number of points scored by Julian and Ahmad was 74. The average number of points scored by Ahmad and George was 71.6. The average number of points scored by Julian, Ahmad and George was 70. The average number of points scored by Michael and George was 66. How many points did each of them score?

1. George
2. Julian
3. Ahmad
4. Michael

(a)
Total score of Julian and Ahmad
= 74 x 2
= 148

Total score of Ahmad and George
= 71.6 x 2
= 143.2

Total score of Julian, Ahmad and George
= 70 x 3
= 210

George's score
= 210 - 148
= 62

(b)
Julian's score
= 210 - 143.2
= 66.8

(c)
Ahmad's score
= 143.2 - 62
= 81.2

(d)
Total score of Michael and George
= 66 x 2
= 132

Michael's score
= 132 - 62
= 70

Answer(s): (a) 62; (b) 66.8; (c) 81.2; (d) 70