plumiDiscrete random variables: CAIE A‑Level Maths questions
Every CAIE A-Level Maths exam question on 5.4 Discrete random variables, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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All 5 questions on Discrete random variables, as a list
- June 2024, Paper 5, Q5 (10 marks): In a certain area in the Arctic the probability that it snows on any given day is 0.7, independent of all other days. (a) Find the probability that in a week (7
- June 2024, Paper 5, Q6 (7 marks): Harry has three coins: • One coin is biased so that the probability of obtaining a head when it is thrown is 3 1 . • The second coin is biased so that the proba
- Specimen, Paper 5, Q3 (7 marks): A book club sends 6 paperback and 2 hardback books to Mrs Hunt. She chooses 4 of these books at random to take with her on holiday. The random variable X repres
- Specimen, Paper 5, Q4 (10 marks): A petrol station finds that its daily sales, in litres, are normally distributed with mean 4520 and standard deviation 560. (a) Find on how many days of the yea
- Specimen, Paper 5, Q5 (7 marks): A fair six-sided die, with faces marked 1, 2, 3, 4, 5, 6, is thrown 90 times. (a) Use an approximation to find the probability that a 3 is obtained fewer than 1
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