Final answer:
Alfred needs to complete approximately 3 pages. The answer is option B.
Step-by-step explanation:
To find the number of pages Alfred needs to complete, we need to first determine the total percentage of completion so far.
- Trey completed 35% of the summary.
- Kirk completed a certain percentage, which we don't know.
- Billy completed 0.15 of the summary.
To find Kirk's completion percentage, we subtract Trey and Billy's percentages from 100%: 100% - 35% - 0.15 = 64.85%.
This means that Alfred needs to complete 100% - (35% + 64.85%) = 0.15% of the summary. Since the report is 20 pages long, Alfred needs to complete 0.15% of 20 pages, which is approximately 0.03 pages. Therefore, Alfred needs to complete 0.03 pages, or approximately 3 pages.
Hence, The answer is option B.