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With and without replacement
Compare two-step probabilities with and without replacement, adjusting the second-stage branches of a tree diagram when items are not returned.
⏱ 20 min❓ 9 questions
What you'll be able to do
- ✔I can explain how removing an item changes the probabilities for the second draw
- ✔I can draw and use tree diagrams for experiments with and without replacement
- ✔I can solve real problems such as raffles and card draws where items are not replaced
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
9 questions and 1 quick teaching card, including:
- 🔘Multiple choice — Tap the answer you think is best, then check it.
- ✏️Fill in the blank — Type the missing word to complete the sentence.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9M9P01