9709/51/O/N/25 · Statistics October/November 2025 Paper 51
7 questions, 50 marks. Each one links to its official mark scheme.
- Question 1 · 6 marks · Probability distributions, Expectation and variance, Conditional probability
- Question 2 · 4 marks · Geometric distribution, Binomial distribution
- Question 3 · 8 marks · Cumulative frequency, median and quartiles, Coded and combined data
- Question 4 · 5 marks · Addition, multiplication and tree diagrams
- Question 5 · 8 marks · Binomial distribution, Normal approximation to the binomial
- Question 6 · 9 marks · Normal probabilities and standardisation, Inverse normal problems
- Question 7 · 10 marks · Arrangements and permutations, Sample spaces and counting probabilities
Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.