Update eggs

I have a question about the random eggs after the update. So there are 100 slots(correct me if I’m wrong) where they repeat, 1 main prize each time. In the random eggs will there be 100 slots with 1 main ark each, and then have another 100 slots right after the first one where the arks r different? Or could there be like 5 of the same hachling (1 main prize) in like 10 slots because it’s random? Basically are the placement of the arks random, and/or the number of arks different (if they get rid of the 100 slots per cycle)?