Cysts After Researching Cysts of a Particular Type, a Doctor

question 175

Essay

Cysts After researching cysts of a particular type, a doctor learns that out of 10,000 such cysts examined, 1,500 are malignant and 8,500 are benign. A diagnostic test is available which is accurate 80% of the time (whether the cyst is malignant or not). The doctor has discovered the same type of cyst in a patient. {Cysts Narrative} In the absence of any test, what is the probability that the cyst is benign?

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