Total investment value of C = (4000 × 3) + (3000 × 9) = 12000 + 27000 = Rs. 39000 Total investment value of D = (5000 × 6) + (6000 × 6) = 30000 + 36000 = Rs. 66000 Investment ratio = 39000 ∶ 66000 = 13 ∶ 22 As, profit ratio is same as investment ratio, ⇒ Share of C in profit = {13/ (13 + 22)} × total profit ⇒ 3900 = (13/35) × total profit ∴ Total profit = Rs. 10500