plumiLinear combinations of random variables: CAIE A‑Level Maths questions
Every CAIE A-Level Maths exam question on 6.2 Linear combinations of random variables, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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All 3 questions on Linear combinations of random variables, as a list
- June 2024, Paper 6, Q1 (3 marks): A bus station has exactly four entrances. In the morning the numbers of passengers arriving at these entrances during a 10-second period have the independent di
- June 2024, Paper 6, Q2 (5 marks): ` j. Two independent random values of X, 2 The random variable X has the distribution N 31 2 10 4 . , . 2 denoted by X1 and X2, are chosen. Find ( P X 2 3 X ) .
- Specimen, Paper 6, Q4 (10 marks): The lifetimes, in hours, of Longlive light bulbs and Enerlow light bulbs have the independent distributions N(1020, 452) and N(2800, 522) respectively. (a) Find
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