(a)[2]
Complete the tree diagram below.
(b)[1]
Calculate the probability that both tiles are white.
Mathematics 4024 · O Level · Probability of combined events
Probability of combined events — practice question
A bag has $4$ black tiles and $6$ white tiles. One tile is picked at random from the bag and then put back. A second tile is then picked at random.
Worked solution & mark scheme
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Tree labelled with $\frac{4}{10}$ for black and $\frac{6}{10}$ for white” …
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