Mathematics 0580 · IGCSE · Probability of combined events

Probability of combined events — practice question

A bag holds 3 blue buttons, 8 white buttons and 5 red buttons. Two buttons are selected at random from the bag, without replacement.
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Calculate the probability that the two buttons are either both red or both white.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: $\frac{19}{60}$” …

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