Most probable velocity, average velocity and root mean square velocity are related as

Most probable velocity, average velocity, and root mean square velocity are related by

The ratio of most probable velocity, average velocity and root mean square velocity is

The ratio of most probable velocity, average velocity and root mran square velocity is

alpha , v and u represent most probable velocity, average velocity and root mean square velocity of a gas at a particular temperature.Which one of the following relationship is correct?

What is root mean square velocity ?