9709 P62 - Nov 2019 - Q5
2901
A fair red spinner has four sides, numbered 1, 2, 3, 3. A fair blue spinner has three sides, numbered -1, 0, 2. When a spinner is spun, the score is the number on the side on which it lands. The spinners are spun at the same time. The random variable X denotes the score on the red spinner minus the score on the blue spinner.
(i) Draw up the probability distribution table for X.
(ii) Find \(\text{Var}(X)\).
