In a study of helicopter usage and patient survival, among the 56,182 patients transported by helicopter, 183 of them left the treatment center against medical advice, and the other 55,999 did not leave against medical advice. If 40 of the subjects transported by helicopter are randomly selected without replacement, what is the probability that none of them left the treatment center against medical advice? The probability is 0 (Round to three decimal places as needed.)

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