hard · GMAT Quantitative Reasoning
A parts-screening station flags a unit as defective with probability 0.95 if the unit is defective and probability 0.05 if it is not. After a positive flag, the posterior probability that the unit is defective is 0.7.
What prior probability of defect is implied?
- 19/20
- 0.891
- 7/10
- 1/2
- 0.109
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