Probability Studio

Beginner → Olympiad

Twelve chapters, from what a probability is to competition problems. Each idea is built on a figure you play with, then put to work.

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Exactly k

N(0, 1)

Probability as area

Counting outcomes

Independence and multiplication

Complement and “at least one”

Exactly k

Conditional probability

Bayes and total probability

Symmetry

States

Expectation and linearity

Conditional expectation

Chance and data

Final round