(a)[3]
Draw up a probability distribution table for $X$.
(b)[3]
Find the values of $\text{E}(X)$ and $\mathrm{Var}(X)$.
Mathematics 9709 · AS & A Level · Discrete random variables
Discrete random variables — practice question
Two fair spinners are used. One has faces labelled $1, 2, 2$ and the other has faces labelled $-2, 0, 1$. Each spinner is spun once, and the number showing when it stops is recorded. The random variable $X$ represents the total of the two numbers.