Samira and Sonia each have a bag that contains 20 sweets. Each bag has 5 red, 6 green and 9 yellow sweets.
(a)[1]
Samira selects one sweet at random from her bag. Write down the probability that she picks a yellow sweet.
(b(i))[2]
Show that the probability that she chooses two green sweets is $\frac{3}{38}$.
(b(ii))[4]
Calculate the probability that the sweets she chooses are not both the same colour.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Hence, $\frac{9}{20}$.” …
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