medium · GMAT Quant
A cybersecurity firm filters network packets through three layers: 'External' (X), 'Encrypted' (E), and 'Validated' (V). The probability a packet is X is dfrac12. Given that a packet is X, the probability it is E is dfrac23. Given that a packet is both X and E, the probability it is V is dfrac110.
What is the probability that a packet is X and E, but is NOT V?
- dfrac310
- dfrac130
- dfrac13
- dfrac115
- dfrac910
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