John scored $38$, $32$, $49$ and $x$ marks for four Mathematics tests. He must score an aver

Question

John scored $38$, $32$, $49$ and $x$ marks for four Mathematics tests. He must score an average of at least $50$ marks if he wants to obtain a pass in Mathematics. Form an inequality in $x$ for the information above so that John can pass his Mathematics. Solve the inequality. Hence, state the minimum mark that John must score for the last Mathematics test in order to pass.

Accepted Answer

(i) $\frac{38+32+49+x}{4}\ge50$. (ii) $x\ge81$. (iii) $81$ marks.

Forming and Solving an Inequality from an Average Score Requirement

Forming and Solving an Inequality from an Average Score Requirement

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