An emergency patient can have two types of disease: Type I with probability 0.4 and Type Il with probability 0.6. If he does not receive adequate treatment, he could die with a probability of 0.8. The doctor can take three actions: 1. do not treat the patient 2. give the patient a drug 3. operate on the patient but these three actions are mutually exclusive. Both an operation and the drug can cause death to the patient, the first with probability 0.5 and the second with probability 0.2. If the patient survives the drug, it would have no effect with probability 0.5 if he had Type I disease, while the probability would be 1 if he had Type Il disease. In the event that he survives the operation, this would be beneficial with probability 0.8 if he has Type I disease and with probability 0.4 if he has Type II.

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