Combina function

This article describes the formula syntax and usage of the COMBINA  function 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

Copy the example data in the following table, and paste it in cell A1 of a new Excel worksheet. For formulas to show results, select them, press F2, and then press Enter. If you need to, you can adjust the column widths to see all the data.

Formula	Description	Result
=COMBINA(4,3)	Returns the number of combinations (with repetitions) for 4 and 3.	20
=COMBINA(10,3)	Returns the number of combinations (with repetitions) for 10 and 3.	220

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