Mathematics 0580 · IGCSE · Averages and measures of spread

Averages and measures of spread — practice question

Amber’s average score over five tests is 80. Her scores in four of those tests are 68, 81, 74 and 89.
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Find her mark on the fifth test.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Method used: $\frac{68 + 81 + 74 + 89 + x}{5} = 80$” …

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