Exam-style question
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For independent events A and B with P(A) = 0.5 and P(B) = 0.5, find P(A and B).
- A.0.25
- B.1.25
- C.-0.75
- D.0.5
Model answer
What a good answer should say
- The correct answer is 0.25.
This answer is tied to the objective: L1 Interpret diagrams for single-variable data, including understanding that area in a histogram represents frequency; connect to probability distributions..
Explanation
Why this works
Use the explanation to connect the worked answer back to L1 Interpret diagrams for single-variable data, including understanding that area in a histogram represents frequency; connect to probability distributions..
The locked answer is 0.25. Work through the given values, keep one operation per line, and check the final step reaches 0.25.
Maths method check
- Topic focus: Statistics.
- Question style: practice.
- Reasoning demand: recall.
- Check the operation, notation, units, and final answer form against the question before moving on.
Common mistake
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