Names | Number of plastic bottles |
Charlotte | 9 |
Benjamin | k |
Elijah | 3 + 2 k |
The table shows the number of plastic bottles collected by 3 pupils.
- Find the total number of plastic bottles Charlotte, Benjamin and Elijah collected. Express the answer in terms of k in the simplest form.
- If k = 5, find the average number of plastic bottles the 3 pupils collected.