A story about how I could easily add expected values for the sum of random variables, but stumbled on variance

Recently, I have been researching the "sum of random variables" as part of my statistics study notes. It is about what ...
TES

IB Math AI Worksheet SL 4.7 - Discrete Random Variables & Expected Value

This IB Math AI SL 4.7 – Discrete Random Variables & Expected Value resource builds students’ understanding of how numerical outcomes from random processes are modelled and analysed. Students learn to ...