Mathematics 0580 · IGCSE · Introduction to probability

Introduction to probability — practice question

There are 20 balls in a bag, and 5 of them are red. One ball is chosen at random from the bag.
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On the probability scale, draw an arrow to indicate the probability that this ball is red.

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This 1-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Arrow positioned at $0.25$” …

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