Data Science, Probability, Statistics, Basics, Machine Learning.
problem was that you have joint probabilities Pr(x=0, y=0) and Pr(x=0, y=1). But if you think about it for a moment, for a specific state that we are interested in (x=0), there’s only two situations. Whether y=0 or y=1. That’s why summing the probability of Pr(x=0, y=0) and Pr(x=0, y=1), we are