$Var(max(X,Y)) = Var(min(X,Y))$ if $X$ and $Y$ are iid $N(0,1)$
The book solution says
$(X,Y)$ has the same distribution as $(-X,-Y)$ since $X$ and $Y$ are iid $N(0,1)$
it follows that $Var(max(X,Y)) = Var(min(X,Y))$
It make sense intuitively but I'm having trouble seeing it.
It make sense to me that $max(X,Y) = -min(-X,-Y)$ so for example the $max(1,4) = -min(-1,-4)$
Then take the variance of both sides $Var(max(X,Y)) = Var(-min(-X,-Y))$
Then take out the negative of the RHS and we have $Var(max(X,Y)) = Var(min(-X,-Y))$
But from here I'm stuck. Thanks for your help and patience.