Mathematics 4024 · O Level · Introduction to probability

Introduction to probability — practice question

A spinner may stop on red, green, yellow or blue. The table gives the probability attached to each result.
(a)[1]

One of the numbers in the table is wrong. Explain how you know this.

(b)[2]

The probability of the spinner landing on blue is wrong. Calculate the correct probability of the spinner landing on blue.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Probabilities total more than 1” …

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