Suppose a container is evaluated to leave first one molecule of a gas in it . Let $\;V_{a}\;$ and $\;V_{rms}\;$ represents the average speed and the rms speed of the gas .

Question

$(a)\;V_{a} > V_{rms}\qquad(b)\;V_{a} < V_{rms}\qquad(c)\;V_{a}=V_{rms}\qquad(d)\;V_{rms}\;is\;undefined$