The normal distribution is a really important topic. It is used in about half of the topics. Today we will just look at the basics. You will either need to know how to use the tables on page 24 of the formula book or how to use your calculator to find probabilities.
Even the most basic questions can get tricky. Below are a couple of videos to get you started. You will though need to look at past papers and do more than what is in this post.
Simpler normal questions
(The AQA normal tables are differently laid out to the Edexcel ones used in this video but you should still obtain the same answers)