So when you think about it, you're like, what's going on here? What are possible explanations for this? This I wouldn't have fretted about. After 10 experiments, not a big deal, but after 10,000, this would have caused me pause. Say, well, why would this happen? I mixed up the bag every time, and there are some different possibilities. Maybe the blue marbles are slightly heavier, and so when you shake the bag up enough, the blue marbles settle to the bottom, and you're more likely to pick a magenta marble.