A thin prism of angle 6º and refractive index for yellow light n_Y = 1.5 is combined with another prism of angle 5º and n_Y = 1.55. The combination produces no dispersion. The net average deviation ($\mathrm{\delta }$) produced by the combination is ${\left(\frac{1}{\mathrm{x}}\right)}^{\mathrm{o}}$. The value of x is…….