# Probabilities That Add Up to One

Students learn how mutually exclusive and exhaustive events are represented in a Venn diagram and probabilities that add up to one.  As learning progresses they use mutually exclusive events to calculate the probability of an event not happening.
##### Differentiated Learning Objective
• All students should be able to identify mutually exclusive events.
• Most students should be able to understand that the probabilities of all possible outcomes sum to 1.
• Some students should be able to calculate the probability of an event not happening.

### Mr Mathematics Blog

#### Angles in Polygons

There are two key learning points when solving problems with angles in polygons.  The first is to understand why all the exterior angles of a polygon have a sum of 360°.  The second is to understand the interior and exterior angles appear on the same straight line. Students can be told these two facts and […]

#### Getting Ready for a New School Year

When getting ready for a new school year I have a list of priorities to work through. Knowing my team have all the information and resources they need to teach their students gives me confidence we will start the term in the best possible way.  Mathematics Teaching and Learning Folder All teachers receive a folder […]

#### Mathematics OFSTED Inspection – The Deep Dive

Earlier this week, my school took part in a trial OFSTED inspection as part of getting ready for the new inspection framework in September 2019. This involved three Lead Inspectors visiting our school over the course of two days. The first day involved a ‘deep dive’ by each of the Lead Inspectors into Mathematics, English […]