Mathematics
Probability
Conceptual
9–10 yrs
Equally Likely Outcomes
等可能结果
Description
Understand that 'equally likely' means every outcome has exactly the same chance of occurring; identify whether a given situation has equally likely outcomes (a fair coin, a fair die, a spinner with equal sections) or unequally likely outcomes (a bag with more of one colour, a spinner with unequal sections)
Mastery Evidence
- Explain that a fair coin has equally likely outcomes because heads and tails each have the same chance
- Identify whether a spinner with unequal sections has equally likely outcomes or not, and explain why
- Give an example of a situation with equally likely outcomes and one without, explaining the difference
Assessment Prompt
Can your child tell the difference between a fair situation — like rolling a normal die where every number has the same chance — and an unfair one, like a bag with many more of one colour than another?
