Equivalent Resistance between X and Y is \n\n[Figure needs to be uploaded later]
- A. 75 $\Omega$
- B. 50 $\Omega$
- C. 275 $\Omega$
- D. None of these
Answer: A. 75 $\Omega$
Explanation: [Figure needs to be uploaded later]\nFirst the rightmost two resistors 50 $\Omega$ and 25 $\Omega$ are in series, resulting in $50+25=75~\Omega$. This makes three 75 $\Omega$ resistors in parallel. $\frac{1}{R'} = \frac{1}{75}+\frac{1}{75}+\frac{1}{75} = \frac{3}{75} \Rightarrow R' = 25~\Omega$. Finally, $R_{eq} = 50 + 25 = 75~\Omega$.