Average velocity:

$\overline{){{\mathbf{v}}}_{\mathbf{a}\mathbf{v}\mathbf{g}}{\mathbf{=}}\frac{{\mathbf{v}}_{\mathbf{1}}\mathbf{+}{\mathbf{v}}_{\mathbf{2}}\mathbf{+}\mathbf{.}\mathbf{.}\mathbf{.}\mathbf{+}{\mathbf{v}}_{\mathbf{N}}}{\mathbf{N}}}$

Eleven molecules have speeds 15, 16, 17, . . . , 25 m/s.

Calculate v(avg)

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