A mixture of $2\, moles$ of helium gas (atomic mass $= 4\, u$), and $1\, mole$ of argon gas (atomic mass $= 40\, u$) is kept at $300\, K$ in a container. The ratio of their rms speeds $\left[ {\frac{{{V_{rms}}{\rm{(helium)}}}}{{{V_{rms}}{\rm{(argon)}}}}} \right]$, is close to
JEE MAIN 2019, Medium
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