9709/52 · May/June 2025
Probability & Statistics 1 · 50 marks · 7 questions
- Question 13 marks
Probability distribution for the number of tails from three biased coins.
- Question 25 marks
Normal approximation to a binomial probability.
- Question 35 marks
Conditional probability when drawing marbles with and without replacement.
- Question 46 marks
Probability that the first success comes on or before a given trial.
- Question 510 marks
Read a cumulative frequency graph, then estimate the mean and standard deviation of grouped data.
- Question 69 marks
Arrangements and selections of letters from a word with repeated letters and restrictions.
- Question 712 marks
Normal probabilities, finding the mean and standard deviation from percentages, and a binomial probability.