Mathematics 0580 · IGCSE · Averages and measures of spread

Averages and measures of spread — practice question

Rahul’s 10 test scores are $9, 8, 9, 10, 7, x, 9, 9, x, 7$. Their mean equals 8.
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Calculate the interquartile range. Show every step of your working.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “\(\frac{68+2x}{10}=8\) or any equivalent correct equation” …

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