# Drawing two numbers from a set

Two numbers $X_1$ and $X_2$ are drawn randomly from the set $\{1,2,...,n\}$ without replacement. Find $P(X_2 > X_1)$.

Now I know that once we choose $X_2$ we have $X_2 - 1$ options for $X_1$ to hold the condition that $X_2 > X_1$ but the fact that we choose $X_1$ first kind of makes me confused.