Calculate the equivalent resistance of two resistors, R1 = 300 Ω and R2 = 200 Ω, connected in parallel.

For two resistors $R_1$ and $R_2$ connected in parallel, the equivalent resistance $R_{eq}$ is given by the formula:

$$R_{eq} = \frac{R_1 \times R_2}{R_1 + R_2}$$

From the image, the values are $R_1 = 300 \, \Omega$ and $R_2 = 200 \, \Omega$.

$$R_{eq} = \frac{300 \, \Omega \times 200 \, \Omega}{300 \, \Omega + 200 \, \Omega}$$

$$R_{eq} = \frac{60000 \, \Omega^2}{500 \, \Omega}$$ $$R_{eq} = 120 \, \Omega$$

The equivalent resistance for the parallel combination is $\text{120 } \Omega$.