deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 013ef44..6baa769 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
\\  $a_i=1/n$:\\  $\mathbb{V}\delta=\sum_{i=1}^{n}\frac{1}{n^2}\mathbb{V}X_i + \sum_{i\neq j}\frac{1}{n^2}\mathbb{V}X_i\\  =\mathbb{V}X_1(1/n+\frac{1+n}{2n})$ =\mathbb{V}X_1\frac{1+n}{2n}$