4 men and 5 women can complete a work in 15 days, whereas 9 men and 6 women can complete it in 10 days. To complete the same work in 7 days, how many women should assist 4 men?

• ক 10
• খ 11
• গ 15
• ঘ 13 ✅ সঠিক উত্তর