Mathematics 0580 · IGCSE · Averages and measures of spread

Averages and measures of spread — practice question

Seven numbers have a mean of $16$. The six values given are $12, 20, 19, 10, 21$ and $13$.
(main)[2]

Find the 7th number.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “$17$ ” …

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