deletions | additions       diff --git a/untitled.tex b/untitled.tex  index b4e3831..013ef44 100644  --- a/untitled.tex  +++ b/untitled.tex 
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\\  \\  $a_i=1/n$:\\  $\mathbb{V}\delta=\sum_{i=1}^{n}\frac{1}{n^2}*\mathbb{V}X_i $\mathbb{V}\delta=\sum_{i=1}^{n}\frac{1}{n^2}\mathbb{V}X_i  + \sum_{i\neq j}\frac{1}{n^2}*\mathbb{V}X_i$ j}\frac{1}{n^2}\mathbb{V}X_i\\  =\mathbb{V}X_1(1/n+\frac{1+n}{2n})$