calculate grouping measure by table

[Disco2021]

Hello all !
i have one problem 
I want to calculate a measure from a table that shows the number of orders by (country, city, group) in the table with customers (last column in example table)

example my table on report page : 

[amitchandak · Accepted solution]

@Disco2021 , Create a measure like given example

countx(filter(allselected(Table),[country] =max([country]) && [city] = max([city] ) && [group] = max([group])), [cutomer ID])

[Disco2021]

Thanks! it is worked! 🙏