hard · GMAT Quantitative Reasoning
A malware scanner flags a packet as defective with probability 0.6 if the unit is defective and probability 0.2 if it is not. After a positive flag, the posterior probability that the unit is defective is 0.75.
What prior probability of defect is implied?
- 1/3
- 3/4
- 3/5
- 2/3
- 1/2
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