Past exam of the mathematics course of the University of Cambridge / 2023 / iii / Paper 123 / 3 / 2

The Chebotarev density theorem says that if $L/K$ is a finite Galois extension with group $G$ and $C\subseteq G$ is a conjugacy class, then the unramified primes $\mathfrak{p}$ whose Frobenius conjugacy class equals $C$ have Dirichlet density