Cambridge AS & A Level Mathematics
5.4Discrete random variables
Discrete random variables in Cambridge AS & A Level Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Topic56 practice questions3 lessons
Learning objectives
What the syllabus expects you to be able to do.
- 5.4.1Draw up a probability distribution table for a discrete random variable and calculate E(X) and Var(X).
- 5.4.2Use the binomial and geometric probability formulae and recognise situations they model.
- 5.4.3Use the mean and variance of the binomial distribution and the expectation of the geometric distribution.
Lessons
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Discrete random variables: expectation and variance
45 min
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The binomial distribution
50 min
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The geometric distribution
40 min
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Sample question
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