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# AVG

### Description

`AVG` takes all the values you provide in between a set of brackets, each separated by a comma, and gives you their average.

`AVG` can also return the average of values that are produced by another function.

### Examples

```
p is Person
AVG(p.base_fee, p.transaction_fee, p.report_fee)
```

This [expression](/rule-language/expressions.md) calculates the average of the base fee, the transaction fee, and the report fee regarding a person in a [case](/guides/glossary/case.md).

```
AVG(
    get_properties_from_instances(
        instances(AccountHolder), personal_income
    )
)
```

This expression works in a couple of steps to bring you the result:

* `AVG( .... )` is the overarching function, of which you want the result. In between its brackets sits another function.
* `get_properties_from_instances(.......)` is the function inside the `AVG` brackets, which goes and fetches the property of the instances you specify.
* `instances(AccountHolder, personal_income)` returns the personal income of all the accountholders.
* These three combined, give you the average of the personal incomes for all the account holders in the case.