Two urns, Ui and U2, contain, respectively, two white and three black balls, and three white and two black balls. One ball is transferred from Ux to U2 and thereafter (a) a ball is drawn from f/2, the...

Two urns, Ui and U2, contain, respectively, two white and three black

balls, and three white and two black balls. One ball is transferred from

Ux to U2 and thereafter (a) a ball is drawn from f/2, the event being

that the ball is white; (b) two balls are drawn from t/2, the event being

that one of them is white and the other black.