Mathematics 0580 · IGCSE · Conditional probability

Conditional probability — practice question

Katy chooses one number at random from 2, 3 and 5, and then selects one number at random from 5, 6, 7 and 9. The sum of the two chosen numbers is even.

(main)[3]

Determine the probability that exactly one of the two chosen numbers is a 5.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct outcome identification” …

Full mark scheme, point by point
Step-by-step worked solution
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