Names | Number of glass bottles |
Gabriel | 8 |
Riordan | r |
Rachel | 4 + 3 r |
The table shows the number of glass bottles collected by 3 children.
- Find the total number of glass bottles Gabriel, Riordan and Rachel collected. Express the answer in terms of r in the simplest form.
- If r = 3, find the average number of glass bottles the 3 children collected.