Probability of Two Events — Interactive Lesson & Worksheet (Ages 11–14)

Still unsure whether to add or multiply when combining two probabilities? This 19-slide interactive lesson, paired with a genuinely substantial 9-page worksheet, gives pupils extensive practice calculating the probability of two events.

Mastering Probability of Two Events in KS3 Maths

Pupils practise calculating the probability of two combined events, building the fluency within the KS3 National Curriculum area of probability. Knowing when to add and when to multiply is a genuinely common source of confusion, and this lesson plus a substantial worksheet gives pupils extensive practice telling the two situations apart correctly.

What’s Included

• 19-slide interactive lesson on probability of two events
• A printable 9-page worksheet for further practice
• Self-marking activities with instant feedback
• Step-by-step guidance choosing the correct method

Key Benefits for Students

• Builds genuine confidence choosing between adding and multiplying
• Instant feedback confirms correct working straight away
• The substantial printable worksheet extends practice well beyond the screen
• Reduces a genuinely common source of probability errors

Why Teachers Love It

• No prep — the lesson and worksheet are both ready to use
• Works on any interactive whiteboard or shared screen
• Self-marking activities free you up to support individual pupils
• A genuinely substantial worksheet component, nine pages in total
• A dependable resource for a topic pupils often find genuinely tricky

Love this? You’ll love…

• Formal Methods: Adding Integers — Interactive Lesson (Ages 11–14)
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A strong addition to any KS3 probability topic, whether taught as the main lesson or used for focused revision closer to an exam covering combined probability events. Getting this distinction genuinely secure here also prepares pupils well for more advanced conditional probability work that follows soon afterwards at the proper GCSE exam level.

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FAQ

What year groups is this for? KS3 (Years 7–9, ages 11–14).

Is there a printable component? Yes, a substantial 9-page worksheet is included.

Is it self-marking? Yes, instant feedback throughout.