A group of bloggers aims to write 200 posts in 20 days. If 4 leave after 10 days from a team of 10, how many extra days are needed
Correct answer: B. 3
- A. 2
- B. 3
- C. 4
- D. 5
Explanation
To solve this problem, begin by calculating the total work required, which is 200 posts. Initially, a team of 10 bloggers can complete 200 posts in 20 days, meaning they produce 10 posts per day. In the first 10 days, with a full team, they will complete 100 posts. After 10 days, 4 bloggers leave, leaving 6 bloggers to finish the remaining 100 posts. These 6 bloggers can produce 6 posts per day, requiring 100/6 ≈ 16.67 days to finish. Since 10 days have already passed, an additional 6.67 days are needed, which rounds to approximately 3 extra days. Therefore, the correct answer is 3 extra days. The incorrect options either underestimate or overestimate the time needed based on incorrect assumptions about productivity changes.
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