hard · GMAT Quantitative Reasoning
A shipment is defective with prior probability 0.04. A first screen flags defectives with probability 0.85 and healthy lots with probability 0.15. A second independent audit flags defectives with probability 0.8 and healthy lots with probability 0.12.
Given that both screens flag the lot, what is the probability it is defective?
- 0.680
- 0.612
- 0.040
- 0.191
- 0.388
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