Statistics and Probability · Combinatorics and conditional probability

Combinatorics and counting

Counting how many ways something can happen, permutations and combinations, without listing them all.

Also known as: permutations, combinations, counting rules.

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Learn first

• Probability basics: The formal rules, sample spaces, events, axioms, that make "the chance of something" a well-defined number.

Leads to

• Common discrete distributions: The handful of discrete shapes, Bernoulli, Binomial, Poisson, Geometric, that keep showing up because they model real repeated-trial situations.

Related topics

• Common discrete distributions: The handful of discrete shapes, Bernoulli, Binomial, Poisson, Geometric, that keep showing up because they model real repeated-trial situations.