(a)[3]
Construct the probability distribution table for $X$.
(b)[3]
Determine the value of $\mathrm{Var}(X)$.
(c)[2]
Determine the probability that $X$ is even given that $X > 3$.
Mathematics 9709 · AS & A Level · Discrete random variables
Discrete random variables — practice question
A fair six-sided die has faces numbered 1, 2, 2, 3, 3, 3. The random variable $X$ gives the total score after the die is rolled twice.
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This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A table showing the correct $x$-values with at least one right probability paired to the correct $x$-value” …
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