Maths Monster
PROB.3.3

Addition and multiplication rules in probability

Derive the "and" and "or" rules from a sample space diagram

4 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.

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10:02
Grade 4–8 Core 🇺🇸 US

Multiplication & Addition Rule - Probability - Mutually Exclusive & Independent Events

The Organic Chemistry Tutor 3.4M views

Clear, thorough walkthrough of both the and/multiply and or/add rules with mutually exclusive and independent events.

3:12
Grade 4–7 Core 🇺🇸 US

The Multiplication Rule of Probability - Explained

Jeremy Blitz-Jones 238K views

Crisp, well-animated explanation of the AND (multiplication) rule for independent and dependent events.

10:43
Grade 4–7 Core 🇺🇸 US

Addition rule for probability | Probability and Statistics | Khan Academy

Khan Academy 1.7M views

Uses Venn diagrams to build the addition rule from scratch, reinforcing why you subtract the overlap.

6:38
Grade 4–7 Core 🇬🇧 UK

The OR Rule - Corbettmaths

corbettmaths 110K views

Trusted UK GCSE take on the OR rule for mutually exclusive and non-mutually-exclusive events.