Topic : kinetic theory of an ideal gas

Ten molecules have speeds 1 m/s, 2 m/s, 3 m/s .......... and 10 m/s respectively. The rms speed of these molecules will be

If $v_{avg}$ is average speed and $v_{rms}$ is root mean square speed of molecules of ideal gas, then the ratio of $v_{avg}/v_{rms}$ is