Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
Among a group of 30 teenagers, 13 of the 18 males watch ‘Kops are Kids’ on television, while 3 of the 12 females watch ‘Kops are Kids’.
(i)[4]
Find the probability that a randomly selected person from the group is female or watches ‘Kops are Kids’ or both.
(ii)[2]
With working shown, decide whether the events ‘the person chosen is male’ and ‘the person chosen watches Kops are Kids’ are independent or not.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$P(F)=\frac{12}{30}$ or $P(W)=\frac{16}{30}$ or $P(M\cap W)=\frac{5}{30}$ is shown” …