Resistance in series will be given as R = 10+10 → 20 Resistance in parallel will be given as \(\frac{1}{R}\) = \(\frac{1}{10}\) + \(\frac{1}{10}\) \(\frac{1}{R}\) = \(\frac{2}{10}\) → \(\frac{1}{R}\) = \(\frac{1}{5}\) Resistance in parallel = 5 Total resistance = 20 + 5 → 25ohms