Mathematics 0580 · IGCSE · Equations

Equations — practice question

The mean value of three numbers is 150. Those numbers are 361, $2n$ and $(n - 1)$.
(main)[3]

Determine the value of $n$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct use of $3\times150=361+2n+n-1$” …

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