Urn A has six white balls and five black balls. Urn B has four white balls and three black balls. Ball is drawn from Urn A and then put it to Urn B. Ball is then drawn from Urn B. Find probability that transferred ball was white provided that second ball drawn was white?
Urn A has five white balls and three black balls. Urn B has seven white balls and four black balls. Ball is drawn from Urn A and then put it to Urn B. A ball is then drawn from Urn B. Find probability that transferred ball was black provided that second ball drawn was black?