Jabarkan or some other properties. dari Masalah Urn dalam bahasa sunda

In this basic urn modél in probability theory, the urn contains x white and y black balls; one ball is drawn randomly from the urn and its color observed; it is then placed back in the urn, and the selection process is repéated.

Possible questions that can be answered in this modél are:

can I infer the proportion of white and black balls from n observations ? With what degree of confidence ?

knowing x and y, what is the probability of drawing a specific sequence (e.g. one white followed by one black)?

if I only observe n white balls, how sure can I be that there is no black balls?