Average can be simply calculated by adding all the values that are given in the list and dividing them with the total number of values in the list.
Average= (sum of all values)/(total number of values)
If we have: 1,3,5,7,9 as values so their average can be calculated by adding these numbers (total= 25) and dividing with 5.
The answer will be '5'. So, "5" is the average of the set of values that are given.
Average calculator can be found online or can be given in the spreadsheet softwares like Microsoft Excel, Google sheet and statistics software like SPSS etc.