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In a study of helicopter usage and patient​ survival, among the 55,564 patients transported by helicopter,...

In a study of helicopter usage and patient​ survival, among the 55,564 patients transported by helicopter, 154 of them left the treatment center against medical​ advice, and the other 55,410 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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