Harry, Xavier, Jeremy and Brandon participated in a Mathematics quiz. The average number of points scored by Harry and Xavier was 74. The average number of points scored by Xavier and Brandon was 71.9. The average number of points scored by Harry, Xavier and Brandon was 73. The average number of points scored by Jeremy and Brandon was 68. How many points did each of them score?

1. Brandon
2. Harry
3. Xavier
4. Jeremy

(a)
Total score of Harry and Xavier
= 74 x 2
= 148

Total score of Xavier and Brandon
= 71.9 x 2
= 143.8

Total score of Harry, Xavier and Brandon
= 73 x 3
= 219

Brandon's score
= 219 - 148
= 71

(b)
Harry's score
= 219 - 143.8
= 75.2

(c)
Xavier's score
= 143.8 - 71
= 72.8

(d)
Total score of Jeremy and Brandon
= 68 x 2
= 136

Jeremy's score
= 136 - 71
= 65

Answer(s): (a) 71; (b) 75.2; (c) 72.8; (d) 65