The salaries of A, B and C are in the ratio 1:3:4 and increased by 5%, 10% and 15% respectively. Then the increased salaries will be in the ratio:

🧠 Explanation:

If salaries of A, B, and C are in the ratio 1:3:4 and increase by 5%, 10%, and 15%, the new ratio is 21:66:92. Initial salaries are 1x, 3x, 4x; after increases, they become 1x × 1.05 = 1.05x, 3x × 1.1 = 3.3x, 4x × 1.15 = 4.6x. The ratio 1.05:3.3:4.6, multiplied by 20, is 21:66:92. This problem tests percentage calculations, relevant in finance or economics, ensuring accurate salary adjustments in real-world scenarios.