Probability Normalization

We can use this if we have $P(A\wedge B)$ and we want to know $P(B)$. Or just in general when we want to compute a Conditional Probability.

$P(A\mid B)=\alpha P(A\wedge B)$ In the end we just have to scale the sum of the relative probabilities to equal $1$ with the normalization constant $\alpha$.