The full quote is :
"Rund 40 unterschiedliche Enden soll Inquisition erzahlen. Das ist ein ambitioniertes Ziel - auch wenn einige dieser Enden nur in Nuancen voneinander abweichen."
The question is how are they counted since ME3 can be described as having 3 (red,green,blue) or roughly 50 endings, depending wheter you count every unique combination of endind slides in the extended cut as a different ending or not.
Major variations in ME3 are 9:
(1) high-EMS and low-EMS variants of three main endings (P-Control, R-Control, Destroy) (6)
(2) Extra-low EMS variant of Destroy where Earth is destroyed (1)
(3) Refuse and Synthesis (2)
The epilogue-relevant subplots are Tuchanka and Rannoch with three epilogue-relevant outcomes each. If you count every variation of the original 9 you get 81, minus a few unavailable with certain main options, so that was not the way they counted them.
The point is, if you count every resolution of a major subplot as an ending variation, you'll end up way beyond the quoted numbers. Just try the same with DAO if you don't believe that.
So...I don't know how they're counting. It is rather odd.