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In a study of heloopter usuge and potient survival, among the 54,105 patients transporied by helicoptec, 191 of them left the treatment center against medical advice, and the other 63,914 did not. leave apainst medical advice. If 60 of the subjects transported by holicopter are fandomly selected without replacement, what is the probabily that none of them iof the treatment center against medical advice? The probsidis is (thound to three decimal places as needed)