Ryan, Ivan, Brandon and Howard participated in a Chinese quiz. The average number of points scored by Ryan and Ivan was 74. The average number of points scored by Ivan and Howard was 71.7. The average number of points scored by Ryan, Ivan and Howard was 72. The average number of points scored by Brandon and Howard was 67. How many points did each of them score?

1. Howard
2. Ryan
3. Ivan
4. Brandon

(a)
Total score of Ryan and Ivan
= 74 x 2
= 148

Total score of Ivan and Howard
= 71.7 x 2
= 143.4

Total score of Ryan, Ivan and Howard
= 72 x 3
= 216

Howard's score
= 216 - 148
= 68

(b)
Ryan's score
= 216 - 143.4
= 72.6

(c)
Ivan's score
= 143.4 - 68
= 75.4

(d)
Total score of Brandon and Howard
= 67 x 2
= 134

Brandon's score
= 134 - 68
= 66

Answer(s): (a) 68; (b) 72.6; (c) 75.4; (d) 66