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In the square diagrams, the braces represent proportions of areas. $P(A)$ is the fraction of the total sample space where event A occurs (a vertical strip).

Conditions: The visualization assumes probabilities can be represented by relative areas.; Both A and B have positive probability for the ordinary conditionals used here.

In the square diagrams, the braces represent proportions of areas. $P(A)$ is the fraction of the total sample space where event A occurs (a vertical strip).

Conditions: The visualization assumes probabilities can be represented by relative areas.; Both A and B have positive probability for the ordinary conditionals used here.