Names | Number of tin cans |
Riordan | 3 |
Salik | a |
Jayden | 6 + 3 a |
The table shows the number of tin cans collected by 3 pupils.
- Find the total number of tin cans Riordan, Salik and Jayden collected. Express the answer in terms of a in the simplest form.
- If a = 9, find the average number of tin cans the 3 pupils collected.