Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The hybridization of central atom in ${\left[{\mathrm{H}}_6{\mathrm{SnO}}_6\right]}^{2-}$ is ${\mathrm{s}}^{\mathrm{x}}{\mathrm{p}}^{\mathrm{y}}{\mathrm{d}}^{\mathrm{z}}$. Then the value of $\frac{\mathrm{x}+\mathrm{y}}{\mathrm{z}}$ is?