Mathematics 0580 · IGCSE · Probability of combined events

Probability of combined events — practice question

A bag holds 2 green buttons, 5 red buttons and 6 blue buttons. Two buttons are chosen at random from the bag without replacement.
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Calculate the probability that the two buttons have different colours.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The correct probability is $\frac{2}{3}$” …

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