# Concept derivation guides

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Concept guide



## [Conditional probability in finite models: positive denominators, the two directions and null conditioning events](/en/derivations/derivation-mko-conditional-probability-01/?from=%2Fen%2Fderivations%2F%3Fq%3Dmko-conditional-probability)

In the finite model on S={1,2,3,4,5,6} with weights w=(1,2,3,2,4,0)/12, let A={2,3}, B={3,4,5,6} and Z={6}. Validate the model, compute P(A|B) and P(B|A), compare them with the equiprobable count ratio |A∩B|/|B| and with the product P(A)P(B), and decide whether P(A|Z) is defined.

Conditional probability in finite models

derivation-mko-conditional-probability-01





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