- tags
- Math
- source
- https://www.khanacademy.org/math/statistics-probability/probability-library/conditional-probability-independence/v/calculating-conditional-probability

## Explaination

The probability of an event `A`

happening may depend on the
probability of another event `B`

happening. We express that with
this notation.

```
P(A|B)
```

Note: this is read Probability of A given B.

In order to calculate this probability there is something we have to consider, which is that:

```
P(A and B) = P(A|B) * P(B) = P(B|A) * P(A)
```