73. The parallel combination of a 470 Ω resistor and a 680 Ω resistor is in series with the parallel combination of four 2 kΩ resistors. The total resistance is___________? September 7, 2025 by Admin A. 1,650 Ω B. 1,078 Ω C. 77.8 Ω D. 778 Ω ✅ The correct answer is option D.