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