## Articles tagged with "probability"

# Linearity of Expectation

October 15, 2018

To introduce this topic, let’s start with an innocuous problem:

You have \(10\) six-sided dice. If you roll all of them, what is the expected sum of the faces?

Your intuition should tell you that it’s \(35\). But what’s really going on here is an example of a slick principle called **linearity of expectation**.