Spinning wheel and bag of marbles – events and probability

MathematicsProbabilityAges 12–13

A spinning wheel is divided into colored slices of different widths (or a bag holds a matching number of marbles per color). Spin once or spin fast many times; a table and chart compare each color's experimental frequency with its probability, calculated as that color's slot count divided by the total. Change the slot ratios to see certain, impossible, and random events in action (a slot count of 0 gives an impossible event).