# Sample Space

Sometimes it is helpful to list all of the possible ways that a chance process can turn out.

## Sample Space

In statistics, the **sample space** is the set of all possible outcomes of an event. For example, the sample space of rolling a fair six-sided die is shown below:

We can also look at the sample space for rolling two fair six-sided dice. The image below shows the 36 possible outcomes for rolling two fair six-sided dice.

Understanding the idea of sample space can help us calculate probabilities. We know that the probability of a certain outcome can be written as: P(outcome) = # of that outcome / total # of possibilities

The sample space can help us find the numerator and denominator of probabilities.

# Example Walk-Throughs with Worksheets

### Video 1: Sample Space and State Space

Follow along with the worksheet to work through the problem:

# Practice Questions

**Q1**: Say we are rolling 2 dice. What is the probability that at least one die lands on a 2?

**Q2**: What is the sample space of flipping 5 coins?