Count number of person per Id

[paulemmanuel]

Dear community

I tried to search in the forum but didn't find anything helping

Here is my problem
I have a table which gives, per Id (which is a project Id) who are the persons involved in it. 
For instance, in below table, there are 2 persons per Id, except for the last one. There are 2 engineers. 

I would like a measure that give the total number of persons per Id in order to have something like

But when I filter on a specific Id Ingeneer, it need to keep the same value

In this example, IdEngineer number 3310 in involved in only one project. But there are 3 persons in total on the same project
I need it as a measure because this value will be used for other calculations. 

I hope I am clear enough

Thanks in advance

[paulemmanuel]

That simple? 

Seems working
Thanks

[johnt75 · Accepted solution]

Try

Num people =
CALCULATE ( COUNTROWS ( 'Table' ), REMOVEFILTERS ( 'Table'[Engineer ID] ) )