I read this before https://wiki.hoggitworld.com/view/DCS_editor_Randomization , seems it is group condition but i still not sure how it's work.
For example, I have 3 group, group A, group B and Group C, and I want the mission only spawn one of them but no other, so what am I going to do is: trigger once, condition random 50%, random 30%, random 20% in order (from top to bottom), then input action active group A, active group B, active Group C in order(from top to bottom), then the result final is only 1 of 3 group will spawn, though group A has the biggest chance since it is the first order and it has 50%. Am I right?