CERTIFIED-IN-CYBERSECURITY · Question #207
What is the likelihood of an earthquake in the downtown area of Paris, if the records show that a big earthquake happens every 100 years?
The correct answer is C. 0.01. This question tests the calculation of Annualized Rate of Occurrence (ARO) used in risk assessments. If a big earthquake occurs once every 100 years, the annual probability (likelihood per year) is: 1 ÷ 100 = 0.01. This means there is a 1% chance of the event occurring in any…
Question
What is the likelihood of an earthquake in the downtown area of Paris, if the records show that a big earthquake happens every 100 years?
Options
- A0.1
- B1
- C0.01
- D100
How the community answered
(49 responses)- A4% (2)
- B2% (1)
- C92% (45)
- D2% (1)
Explanation
This question tests the calculation of Annualized Rate of Occurrence (ARO) used in risk assessments. If a big earthquake occurs once every 100 years, the annual probability (likelihood per year) is: 1 ÷ 100 = 0.01. This means there is a 1% chance of the event occurring in any given year. Option A (0.1) would imply the earthquake happens every 10 years. Option B (1) would mean it happens every year. Option D (100) is the recurrence interval in years, not the probability. The correct interpretation is a 0.01 annualized probability.
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