Probability Tree Builder — Ebora

🌳 Probability Tree Builder

Build a probability tree branch by branch. EboraBot computes every path (joint) probability, checks that each fork's branches add up to 1, and — when you tag the final outcomes — works out the Law of Total Probability and Bayes' theorem posteriors for you. Free to use.

🌳 Free — build as many trees as you like. Balance … EP. Tip: enter probabilities as decimals (0.25) or simple fractions (1/6).

1 · Build your tree

Add a branch for each possible outcome at the first stage, then add sub-branches under any branch for the next stage. Give each branch a label and its conditional probability.

2 · Probability tree

Each branch shows its conditional probability; each leaf shows the joint probability of the whole path (product of the branch probabilities).

🌳 Probability Tree Builder

1 · Build your tree

2 · Probability tree

3 · Path (joint) probabilities

4 · Total probability & Bayes