Final answer:
The administrative time spent dealing with the same 20% of people causing 80% of the problems can be expected to be 20% to 30%.
Step-by-step explanation:
The question is asking how much of the administrative time can be expected to be spent dealing with the same 20% of people who are causing 80% of the problems. In this case, we can assume that the same proportion of administrative time will be spent on this 20%.
Therefore, the correct answer is option 1, 20% to 30%.