Build probability trees for two or three trials — coin flips, dice rolls, or counters from bags.
Compare with replacement and without replacement, then run experiments
and match your results to the theory.
Quick presets
Try:
Shared bag contents
All draws come from this single bag. After each draw the counter is not replaced,
so branch probabilities change on the second and third draws.
Choose a preset or configure your trials above.
Probability tree
This scenario has many outcomes — the diagram shows the first stages. Use the table below for every path and probability.
All outcomes
Run trials
Press Run once to start.
Ready
Trials: 0Sample space size: 4
Compare with theory
Theoretical probability
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Choose an event
Experimental probability
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Run trials to collect data
Two-set Venn diagram
Enter counts for a two-set Venn diagram (ξ = total).