Names | Number of tin cans |
Robert | 4 |
Alexander | b |
Samantha | 9 + 4 b |
The table shows the number of tin cans collected by 3 students.
- Find the total number of tin cans Robert, Alexander and Samantha collected. Express the answer in terms of b in the simplest form.
- If b = 4, find the average number of tin cans the 3 students collected.