Q. A can complete a work in 15 days and B in 10 days. After working together for 3 days, what fraction of the work remains?
✅ Correct Answer: (A)
1/2
Explanation: Together they complete 1/15 + 1/10 = 1/6 per day. In 3 days they complete 1/2. Remaining = 1/2.
Explanation by: Deepak Sahoo
Together they complete 1/15 + 1/10 = 1/6 per day. In 3 days they complete 1/2. Remaining = 1/2.