Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

For Joanna’s cooking, the chance that the meal is served on time is $\frac{1}{5}$. The chance that the kitchen ends up in a mess is $\frac{3}{5}$. The chance that the meal is not served on time and the kitchen is not left in a mess is $\frac{3}{10}$. Some of this information is displayed in the table below.
(i)[3]

Copy the table and complete it.

(ii)[2]

If the kitchen is left in a mess, determine the probability that the meal is not served on time.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct probabilities entered in the table (decimals or percentages also acceptable)

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