A nооdle cutter аssembly hаs 38 blаdes. Fоur blades are selected at random and evaluated each day for sharpness. If any dull blade is found, the assembly is replaced with a newly sharpened set of blades. This copywritten question is part of a quiz or exam at Arizona State. It may not be posted or reproduced without the permission of the author, Dr. L. Chattin, and Arizona State University. If eight of the blades in an assembly are dull, what is the probability that the assembly is replaced on the third day of evaluation? Express your answer to four decimal places.