# Arithmetic Mean

Pronunciation: /æ.rɪθˈmɛ.tɪk min/ Explain

The arithmetic mean of a set of numbers is the sum of the numbers divided by how many numbers there are in the set.[2] This is the most commonly used average. The formula for the arithmetic mean is

where are the numbers in the set and is the number of numbers in the set.

For example, the arithmetic mean of is .

The definition of arithmetic mean in mathematical language is

### References

1. McAdams, David E.. All Math Words Dictionary, arithmetic mean. 2nd Classroom edition 20150108-4799968. pg 20. Life is a Story Problem LLC. January 8, 2015. Buy the book
2. arithmetic mean. Merriam-Webster. Last Accessed 6/12/2018. https://www.merriam-webster.com/dictionary/arithmetic%20mean. Buy the book
3. Lodge, Sir Oliver, F.R.S.. Easy Mathematics, Mainly Arithmetic. pg 339. www.archive.org. Easy Mathematics. MacMillan and Company, Ltd.. 1906. Last Accessed 6/12/2018. http://www.archive.org/stream/easymathematicsc00lodgrich#page/339/mode/1up/search/mean.

McAdams, David E. Arithmetic Mean. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/a/arithmeticmean.html.

### Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)