A hazard has an outcome consequence of 1 fatality per event. The unmitigated likelihood is once per twenty years. What is the risk?

A hazard has an outcome consequence of 1 fatality per event. The unmitigated likelihood is once per twenty years. What is the risk?

• A. 5 fatalities per year
• B. 0.1 fatalities per year
• C. 0.05 fatalities per year
• D. 20 fatalities per life

Answer: (C)

To determine the risk in this scenario, we need to consider both the likelihood of the event occurring and the consequences of that event. The probability of the hazard occurring is given as once every twenty years, which translates to a likelihood of 1/20 or 0.05 events per year. The consequence of the hazard, if it were to occur, is 1 fatality per event. Therefore, to find the risk, we multiply the likelihood of the event by the consequence of that event: Risk = Likelihood of the event × Consequence Risk = (0.05 events/year) × (1 fatality/event) = 0.05 fatalities per year. This calculation clearly shows that the risk associated with the hazard, given the received data, is 0.05 fatalities per year. This aligns with the correct answer and reflects a systematic approach to quantifying risk by evaluating both likelihood and consequence.

To determine the risk in this scenario, we need to consider both the likelihood of the event occurring and the consequences of that event. The probability of the hazard occurring is given as once every twenty years, which translates to a likelihood of 1/20 or 0.05 events per year.

The consequence of the hazard, if it were to occur, is 1 fatality per event. Therefore, to find the risk, we multiply the likelihood of the event by the consequence of that event:

Risk = Likelihood of the event × Consequence

Risk = (0.05 events/year) × (1 fatality/event) = 0.05 fatalities per year.

This calculation clearly shows that the risk associated with the hazard, given the received data, is 0.05 fatalities per year. This aligns with the correct answer and reflects a systematic approach to quantifying risk by evaluating both likelihood and consequence.