Names | Number of cardboard |
Olivia | 7 |
Ellie | r |
Mason | 5 + 8 r |
The table shows the number of cardboard collected by 3 pupils.
- Find the total number of cardboard Olivia, Ellie and Mason collected. Express the answer in terms of r in the simplest form.
- If r = 10, find the average number of cardboard the 3 pupils collected.