### Deterministic Experiments

With **deterministic experiments**, the results **can be predicted** before the experiment is conducted.

## Example

If a stone is dropped from a window, it is know, undoubtedly, that the stone will go down. If it is throw up in the air, it is know that it will travel upwards over a certain time interval; but afterwards will come down.

### Random Experiment

With **random experiments**, the results **cannot be predicted**, since they depend on chance.

If a coin is flipped, it is not known beforehand whether it will be heads or tails.

Similarly, if a die is rolled, the result cannot be determined beforehand.

### Probability Theory

**Probability theory** deals with assigning a **number** to each **possible result** that can occur in a **random experiment**. With this being said, the following definitions need to be introduced:

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