Final answer:
The total years of potential life lost (YPLL) for the individuals who died before the target age of 75 is calculated as 221 years. This figure is obtained by summing up the number of years each person fell short of the target age.
Step-by-step explanation:
When calculating the total years of potential life lost (YPLL), you want to find the combined years that each person fell short of the target age. In this case, the target age is 75 years. Let's calculate the YPLL for each individual and then sum these numbers to find the total YPLL.
- Person 1: Died at 20 years old, so 75 - 20 = 55 years lost
- Person 2: Died at 42 years old, so 75 - 42 = 33 years lost
- Person 3: Died at 75 years old, so 75 - 75 = 0 years lost
- Person 4: Died at 60 years old, so 75 - 60 = 15 years lost
- Person 5: Died at 67 years old, so 75 - 67 = 8 years lost
- Person 6: Died at 70 years old, so 75 - 70 = 5 years lost
- Person 7: Died at 12 years old, so 75 - 12 = 63 years lost
- Person 8: Died at 33 years old, so 75 - 33 = 42 years lost
Adding these up: 55 + 33 + 0 + 15 + 8 + 5 + 63 + 42 = 221 years of potential life lost.
The correct answer to the student's question is not among the provided options (A. 75 years, B. 600 years, C. 537 years). Based on our calculations, the total YPLL for the group is 221 years.