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In a study of helicopter usage and patient survival, among 42,987 patients transported by helicopter, 183 of them left the treatment center against medical advice,

In a study of helicopter usage and patient survival, among 42,987 patients transported by helicopter, 183 of them left the treatment center against medical advice, and the other 42,804 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

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