Question Statement :

A pack contains 4 blue, 2 red and 3 black pens. If a pen is drawn at random from the pack, replaced and the process repeated 2 more times. What is the probability of drawing 2 blue pens and 1 black pen?

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