Question Statement :

There are two bags. The first bag contains 4 white and 5 black balls and the second bag contains 5 white and 4 black balls. Two balls are drawn at random from the first bag and are put into the second bag without noticing their colors. Then two balls are drawn from the second bag. Find the probability that one the balls is white and the other black.

Type in your answer as a decimal number rounded off to two decimal places. For example, if your answer is 22.156, type in 22.16