Nesting multiple function in dax

[Anonymous]

I try to make the following measure:

lesson succes = DIVIDE(COUNTROWS((FILTER('Geanonimiseerde rapportage'; 'Geanonimiseerde rapportage'[Lesson Completion] = "completed"); FILTER('Geanonimiseerde rapportage'; 'Geanonimiseerde rapportage'[Lesson Success] = "passed")));1)

I have in 2 collum rows that can give a value if a lesson is completed or not. so I OR'ed them. But it seems that the countrows doesnt get a table value back now. What am I missing here?

[Greg_Deckler]

I think:

lesson succes = DIVIDE(COUNTROWS(FILTER('Geanonimiseerde rapportage'; 'Geanonimiseerde rapportage'[Lesson Completion] = "completed" || 'Geanonimiseerde rapportage'[Lesson Success] = "passed"));1)

[Anonymous]

Thanks so much, I didn't know you could also use l l in DAX. 

[Greg_Deckler]

You could have also done OR( ... ) but it's way more convenient to use ||