Mean Difference

Suppose that $X_1, \dots, X_{10}$ are independent random variables such that $\mu_i = \mathbb{E}[X_i] = 2i-1$ and $\text{Var}(X_i) = 100$ AKA there is a common variance $100$ but not a common mean. Define $\overline{\mu} = \dfrac{1}{10}\displaystyle \sum_{i=1}^{10} \mu_i$. Compute $\mathbb{E}[(X_1 - \overline{X})^2]$.