Thanks - big algebra bundle now available /teaching-resource/gcse-ks3-big-value-algebra-bundle-11588930?theme=0

As it says in the description, we start by looking at the product rule, some single event probability and then we progress through simple independent trees, replacement trees and then tougher examples which may use a tree or a shorter route for more confident students. I would say 70-80% of the content concerns using probability trees.<br />