(1)

$F\left(X\right)=\frac{E\left(x\right)}{E_{\min }\times E_{avg}}$

(2)

$F\left(X\right)=\frac{E\left(x\right)}{E_{\min }}$

(3)

$F\left(X\right)=\frac{E_{\min }\times E_{avg}}{E\left(X\right)}$

(4)

$F\left(X\right)=\frac{E_{avg}}{E_{\min }\times E\left(X\right)}$

(5)

$F\left(X\right)=\frac{1}{E_{\min }\times E\left(X\right)}+E_{avg}$

(6)

$F\left(X\right)=\frac{1}{E_{\min }\times E\left(X\right)}$

(7)

$F\left(X\right)=\frac{E_{\min }}{E\left(X\right)}$