028概率中等数值题medium
Factory Posterior After One Good and One Bad Item
题目
A part comes from factory A with prior probability 0.6 and from factory B otherwise. Factory A produces defects with probability 0.1; factory B produces defects with probability 0.4. Two parts from the same unknown factory are inspected and exactly one is defective. What is the posterior probability the parts came from factory A?
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