# COMBINA function

This article describes the formula syntax and usage of the **COMBINA** function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.

## Description

Returns the number of combinations (with repetitions) for a given number of items.

## Syntax

COMBINA(number, number_chosen)

The COMBINA function syntax has the following arguments.

**Number**Required. Must be greater than or equal to 0, and greater than or equal to Number_chosen. Non-integer values are truncated.**Number_chosen**Required. Must be greater than or equal to 0. Non-integer values are truncated.

## Remarks

- If the value of either argument is outside of its constraints, COMBINA returns the #NUM! error value.
- If either argument is a non-numeric value, COMBINA returns the #VALUE! error value.
- The following equation is used:

- In the equation above, N is Number and M is Number_chosen.

## Example

The workbook below shows examples of this function. Inspect them, change existing formulas, or enter your own formulas to learn how the function works.

To work more in-depth with the example data in Excel, download the embedded workbook to your computer, and then open it in Excel.