Discrete random variables
5.4What the syllabus asks of you
- draw up a probability distribution table relating to a given situation involving a discrete random variable X, and calculate E(X) and Var(X)
- use formulae for probabilities for the binomial and geometric distributions, and recognise practical situations where these distributions are suitable models
- use formulae for the expectation and variance of the binomial distribution and for the expectation of the geometric distribution.
Read the notes first
Chapter 26: Discrete random variables
Drill this topic
All 141 questions on Discrete random variables, untimed — answer on paper, then mark yourself against the mark scheme.
Make a worksheet
Choose the years and how many questions, then print it with the answers on separate pages.
141 questions
These are structured questions, answered in working rather than by picking an option, so they are not listed here one by one. The drill above puts each in front of you with its mark scheme to check against.