Experimental probability from repeated marble draws

MathematicsProbabilityAges 13–14

A bag holds red, blue, and yellow marbles; draw one at random, record its color, put it back, and repeat N times. Students draw one marble at a time or let it run automatically, watching a graph of the experimental probability k/n for the chosen event settle toward the theoretical probability (that color's count divided by the total). Click a color to switch which event is being tracked.