Half the capsules are green. If you turn the crank 20 times, will you get exactly 10 green? What about 1,000 turns?

0 cm10 cm20 cmglobedispensing wheeldrop chutedoortraycrankShare of capsules by color0 draws so far, each put back0.00.10.20.30.40.50.60.71/2green 15/301/3red 10/301/6blue 5/30drawn so farprobabilityRunning share after each draw0.000.250.500.751.000246810number of drawsLast 10 capsules
draws
0 of 1,000
crank
still · 0 full turns
capsule
none yet
green
probability 1/2 = 0.500
red
probability 1/3 = 0.333
blue
probability 1/6 = 0.167
biggest gap
none yet

Press the steps in order, or press Auto. Each turn of the crank gives one capsule at random. It is counted, then put back.

Probability ideas from the Common Core State Standards for Mathematics, 7.SP.C.5 to 7.SP.C.7 (thecorestandards.org). Falling capsule: g = 9.80 m/s² from OpenStax College Physics 2e, 2.7 Falling Objects; friction and spin are left out on the ramp. Example values: the machine's sizes, 5 cm capsules, the color counts, the 1.2 s crank turn, the six-pocket wheel and the random seed (the same 1,000 draws replay every time). Drawn to scale in centimeters with the Anatomy kit (MIT license).