The COMBIN function in Excel is a powerful tool used to determine the number of combinations that can be formed from a specified number of items. This function is particularly useful in statistics, mathematics, and various fields where combinatorial calculations are necessary.

Syntax

COMBIN(number, number_chosen)

• number: The total number of items in the set.
• number_chosen: The number of items to choose from the set.

Example #1

COMBIN(5, 2)

This function calculates the number of combinations of 5 items taken 2 at a time, which results in 10.

Example #2

COMBIN(10, 3)

This function finds the number of combinations of 10 items taken 3 at a time, yielding 120 as the result.

Example #3

COMBIN(7, 4)

This calculates the combinations of 7 items taken 4 at a time, resulting in 35 combinations.

Error handling

• NUM! This error occurs when the number or number_chosen arguments are non-numeric or when number_chosen is negative or greater than number.
• VALUE! This error appears when either argument is a non-numeric value or text that cannot be interpreted as a number.

Conclusion

In summary, the COMBIN function in Excel is essential for anyone looking to perform combinatorial calculations. By understanding its syntax and how to handle potential errors, users can effectively leverage this function to analyze data and make informed decisions based on combinations.