Question 8

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waecmaths question: 

If 30% of y is equal to x, what, in terms of x is 30% of 3y

Option A: 

$\tfrac{x}{9}$

Option B: 

$\tfrac{x}{3}$

Option C: 

x

Option D: 

3x

waecmaths solution: 

$\begin{align}  & \frac{30}{100}\times y=x \\ & \frac{3y}{10}=x \\ & y=\frac{10x}{3} \\ & \therefore 3y=\frac{10x}{3}\times 3=10x \\\end{align}$

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