Mathematics 0580 · IGCSE · Introduction to probability

Introduction to probability — practice question

A bag contains only 3 green balls, 4 red balls and 1 blue ball. Matt selects one ball from the bag at random. Some probabilities are indicated on the probability scale. The scale has letters A, B, C, D, E, F, G, H, I placed at equal intervals between 0 and 1, with 0.5 marked in the middle.
(a)[1]

Write down the letter that represents the probability that Matt takes a red ball.

(b)[1]

Write down the letter that represents the probability that Matt does not take a blue ball.

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