The response of a patient to medical treatment A can be good, fair, and poor, 60%, 30%, and 10% of the time, respectively. 80%, 60%, and 20% of those that had a góod, fair, and poor response to medical treatment A live at least another 5 years. If a randomly selected patient has lived 5 years after the treatment, what is the probability that s/he had a poor response to medical treatment A? Response Treatment A Live 5 more yrs good 50 fair 30 60 poor 10 8 8 83

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