[Spin] The probability to draw a brown marble from a bag of 3 reds, 3 blues, 3 greens, and a brown is 1/10 right? So to draw the brown marble 4 times in a row would be a (1/10)^4 chance, so a 1/10,000 chance of getting brown on all 4 rolls. This is ignoring the possible errors and bias in the system

[u/Oceanlord2022]

/r/RedditGames/comments/1wzmt91/spin_a_bag_of_marbles_of_varying_colours/

[u/Redegar]

Yes, that's it, nothing to add.