The answer is =AVERAGE(B2:B6)
Or, you can just go to "HOME" tab, then click the arrow down next to AutoSum, click the AVERAGE, then select B2:B6.
Average, which is also called arithmetic mean,can be calculated manually by adding all the numbers in a set, then dividing the count of the numbers in a set. But, in excel, there are shortcut formulas to calculate it.
