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Conditional probability past paper questions

Statistics 9709 · Probability. Calculate conditional probabilities, including P(A given B) = P(A intersect B)/P(B).

It came up in 38 of 42 papers, for about 3 marks a paper when it does. It last came up in October/November 2025.

Often set with Addition, multiplication and tree diagrams, Probability distributions, Sample spaces and counting probabilities, Exclusive and independent events.

39 questions, newest first

1. 9709/51/O/N/25 Question 1 part (c) · 2 marks
2. 9709/53/O/N/25 Question 5 part (c) · 2 marks
3. 9709/51/M/J/25 Question 6 part (c) · 3 marks
4. 9709/52/M/J/25 Question 3 part (b) · 3 marks
5. 9709/53/M/J/25 Question 5 part (c) · 3 marks
6. 9709/51/O/N/24 Question 4 part (b) · 3 marks
7. 9709/52/O/N/24 Question 1 parts (a) (b) · 2 marks
8. 9709/53/O/N/24 Question 5 part (c) · 5 marks
9. 9709/52/M/J/24 Question 2 part (b) · 2 marks
10. 9709/53/M/J/24 Question 1 part (c) · 2 marks
11. 9709/52/F/M/24 Question 1 part (b) · 3 marks
12. 9709/51/O/N/23 Question 5 part (c) · 5 marks
13. 9709/52/O/N/23 Question 6 part (c) · 2 marks
14. 9709/53/O/N/23 Question 3 part (b) · 4 marks
15. 9709/51/M/J/23 Question 3 part (c) · 3 marks
16. 9709/52/M/J/23 Question 4 part (c) · 3 marks
17. 9709/53/M/J/23 Question 5 part (b) · 3 marks
18. 9709/51/O/N/22 Question 5 part (d) · 3 marks
19. 9709/52/O/N/22 Question 1 part (b) · 2 marks
20. 9709/52/O/N/22 Question 5 part (b) · 2 marks
21. 9709/53/O/N/22 Question 7 part (c) · 2 marks
22. 9709/51/M/J/22 Question 6 part (c) · 4 marks
23. 9709/52/M/J/22 Question 7 part (b) · 2 marks
24. 9709/53/M/J/22 Question 6 part (b) · 5 marks
25. 9709/52/F/M/22 Question 6 part (e) · 4 marks
26. 9709/51/O/N/21 Question 3 · 5 marks
27. 9709/52/O/N/21 Question 1 part (b) · 2 marks
28. 9709/53/O/N/21 Question 7 part (c) · 5 marks
29. 9709/51/M/J/21 Question 4 part (c) · 2 marks
30. 9709/52/M/J/21 Question 3 part (b) · 3 marks
31. 9709/53/M/J/21 Question 7 part (a(ii)) · 2 marks
32. 9709/52/F/M/21 Question 2 part (b) · 3 marks
33. 9709/51/O/N/20 Question 4 part (b) · 2 marks
34. 9709/52/O/N/20 Question 4 part (d) · 3 marks
35. 9709/53/O/N/20 Question 5 part (b) · 4 marks
36. 9709/51/M/J/20 Question 5 part (c) · 4 marks
37. 9709/52/M/J/20 Question 2 part (b) · 2 marks
38. 9709/53/M/J/20 Question 1 part (b) · 4 marks
39. 9709/52/F/M/20 Question 6 part (c) · 4 marks

More in Probability: Sample spaces and counting probabilities, Addition, multiplication and tree diagrams, Exclusive and independent events.

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