Venn Diagrams (1 of 2: Calculating probabilities) 

I suggest to use Khanacademy website It's a huge teaching website and contains maths and other science for all levels

TV CUBER Your question does make me question was that really a question? The answer to that is; a small change you will ever get an answer. Try a different formule 🤷🏻‍♂️

Lol. Conspiracy theory: Maybe Eddie uploads appr. 2 months after the recording date for a specific reason. But why?

Propositional Logic, the or you can have something happening, then another thing also happening, the or will be true when one of the things is happening, but also when both happens. When its only, or thing 1 or thing 2 happens, never both

He already made a video on this You can check

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-X32dce7_D48.html

U can learn