So first off id like to quickly introduce myself. My name is josh, i enjoy learning and while im not in school or even college at this time i still like to teach myself different things, almost as a challenge.

Currently im learning about sigma. I have a pretty good understanding of it but came across a problem that has stumpped me. Im still trying to figure out the syntax for the equation to show properly so please bear with me

[tex] \displaystyle{1/n \sum_{i=1}^n X_i}[/tex]

Now i know, or atleast i think i do, without anything left of the sigma it would be X_{1}+ X_{2}+ X_{3}.... + X_{n}so how exactly do i solve this problem?

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