(a)[2]
Show, by using probabilities, that the choice made by this method is not random.
(b)[2]
Describe how Emma could use one throw of a fair six-sided dice to make this random choice.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
Emma has to select one person at random from the three people $P$, $Q$ and $R$. Her plan is to toss two fair coins and count the number, $n$, of heads. If $n$ equals 0, she will select $P$. If $n$ equals 1, she will select $Q$. If $n$ equals 2, she will select $R$.