If 5 men or 7 women can earn Rs. 5250 per day, how much would 7 men and 13 women earn per day?
Answer: C
From the problem, 5 men = 7 women. So, 1 man = 7/5 women. We need to find the earnings of 7 men and 13 women. Let's convert everything to women's earnings. \(7 \text{ men} = 7 \times (7/5) \text{ women} = 49/5 \text{ women}\). Total women = \(13 + 49/5 = (65+49)/5 = 114/5\) women. 7 women earn Rs. 5250 per day. So 1 woman earns \(5250/7 = 750\) per day. Earnings of \(114/5\) women = \((114/5) \times 750 = 114 \times 150 = 17100\). So they earn Rs. 17,100 per day.