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Answer by André Nicolas for Sum of averages to averages of sum

It cannot be done. The average of the $\frac{b_i}{u_i}$ cannot be recovered from the average of the $b_i$ and the average of the $u_i$. For suppose that $b_1=b_2=b_3=b_4=6$ and $u_1=u_2=u_3=u_4=3$....

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Sum of averages to averages of sum

I have the following values $\overline{b}$, and $\overline{u}$which is :$\overline{b} = \dfrac{b_1+b_2+b_3+b_4}{7}$, $\overline{u} = \dfrac{u_1+u_2+u_3+u_4}{7}$is there any way I can get the following...

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