Probability and Independent Events — Interactive Lesson (Ages 12–14)

Does the first coin toss affect the second? This 22-slide interactive lesson teaches independent events in probability, one worked example at a time.

Mastering Independent Events in Year 8–9 Maths

Students learn that events are independent if the outcome of one does not affect the outcome of another, and find the probability of two or more independent events using P(A and B) = P(A) × P(B). Worked examples include rolling a six-sided dice twice, a three-colour spinner spun twice, and Toby rolling a dice while spinning a coin. The rule extends to three events with P(A and B and C) = P(A) × P(B) × P(C).

What’s Included

• 22-slide interactive lesson on independent events
• Learning objectives on recognising and calculating independent events
• Worked examples with dice, spinners and coins
• The extended rule for three independent events
• Fill-in-the-blank questions with instant feedback

Key Benefits for Students

• Builds a clear test for whether events are independent
• Practises the multiplication rule with familiar contexts
• Extends to three events, not just two
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• Worked examples model each step clearly
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A dependable foundation before GCSE probability

Love this? You’ll love…

• Sample Space Diagrams — Interactive Lesson (Ages 11–14)
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A dependable addition to a Year 8–9 probability topic, giving students a clear rule for combining independent events. This rule is the foundation for tree diagrams and later GCSE probability work.

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FAQs

What year group is this for?
Years 8–9 (ages 12–14).

Does it cover three events?
Yes — the rule extends to P(A and B and C).

Is it self-marking?
Yes, with instant feedback on the questions.