DAX measure to calculate average SLA filtered by date

[Anonymous]

I have a working days column that has the working days between submission of an issue, and resolution (i.e. 35, for 35 business days)

I want to create a DAX measure that shows the average for 2020 year only by filtering by submission date, and calculating average 

ReqNo	Submission Date	Business Days
1	3/4/2020	7
2	1/1/2021	55

In the above table, for example, I only want this DAX measure to average 7, since that's in 2020. How can I achieve this? 

[amitchandak · Accepted solution]

@Anonymous , Try a measure like

calculate(Average(Table[Business Days]), filter(Table, year(Table[Submission Date]) =2020))