Cole, Tim, Pierre and Perry participated in a Social Studies quiz. The average number of points scored by Cole and Tim was 78. The average number of points scored by Tim and Perry was 71.7. The average number of points scored by Cole, Tim and Perry was 70. The average number of points scored by Pierre and Perry was 65. How many points did each of them score?

1. Perry
2. Cole
3. Tim
4. Pierre

(a)
Total score of Cole and Tim
= 78 x 2
= 156

Total score of Tim and Perry
= 71.7 x 2
= 143.4

Total score of Cole, Tim and Perry
= 70 x 3
= 210

Perry's score
= 210 - 156
= 54

(b)
Cole's score
= 210 - 143.4
= 66.6

(c)
Tim's score
= 143.4 - 54
= 89.4

(d)
Total score of Pierre and Perry
= 65 x 2
= 130

Pierre's score
= 130 - 54
= 76

Answer(s): (a) 54; (b) 66.6; (c) 89.4; (d) 76