Names | Number of plastic bottles |
Lilian | 8 |
Charlotte | p |
Riordan | 5 + 4 p |
The table shows the number of plastic bottles collected by 3 pupils.
- Find the total number of plastic bottles Lilian, Charlotte and Riordan collected. Express the answer in terms of p in the simplest form.
- If p = 7, find the average number of plastic bottles the 3 pupils collected.