Make a tree diagram to show all the possible outcomes of flipping a coin 4 times. How many outcomes are there?

There are 16 possible outcomes of flipping a coin 4 times.

Tree diagram:

- H
- H
- H
- H
- T
- T
- H
- T
- T
- H
- H
- T
- T
- H
- T
- T
- H
- H
- H
- T
- T
- H
- T
- T
- H
- H
- T
- T
- H
- T