The total resistance of the circuit is equal to

• A. 25 Ohms
• B. 35 Ohms
• C. 15 Ohms
• D. 17 Ohms

Answer: (D)

Total resistance in a mixed circuit is found by collapsing series and parallel groups step by step. In series, resistances simply add. In parallel, combine using R_parallel = 1 / (1/R1 + 1/R2 + ...). You replace each group with its equivalent resistance and keep reducing until only one resistance remains.

If the final reduced resistance in this circuit is 17 ohms, that means all the series additions and parallel reductions have been performed correctly to yield a single 17-ohm value. The exact steps depend on the diagram, but the rule is the same: identify the innermost parallel or series group, replace it with its equivalent resistance, and repeat until one number stays. If you share the circuit, I can walk through the exact reductions to show how you end up with 17 ohms.