Boxes $B_1, B_2$, and $B_3$, contain balls as given below: $\begin{array}{ccc} \text { Box } & \text { White…
Boxes $B_1, B_2$, and $B_3$, contain balls as given below:
$\begin{array}{ccc}
\text { Box } & \text { White } & \text { Black } \\
B_1 & 1 & 2 \\
B_2 & 3 & 1 \\
B_3 & 2 & 3
\end{array}$
One ball is drawn at random from each box. Then, among the balls drawn, the probability that two are black and one is white, is