Given that you drew a white ball, work backward to which box it most likely came from, tracing the cause from the result P(Aᵢ|B)
Module goal. Tell apart "they don't affect each other" from "knowing one, now look at the other," and master the multiplication, conditional, and total probability rules
eastmath.com · 33.4 Independence and Conditional Probability · 33.4.5 A First Look at Bayes' Formula