Q. A, B, and C complete a work in 12, 15, and 20 days respectively. Working together for 3 days, what fraction of work remains?
✅ Correct Answer: (B)
2/5
Explanation: 1 day work = 1/12 + 1/15 + 1/20 = 1/5. In 3 days = 3/5. Remaining = 2/5.
Explanation by: Yami Thakur
1 day work = 1/12 + 1/15 + 1/20 = 1/5. In 3 days = 3/5. Remaining = 2/5.