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Problem 143

Geometry Difficulty 1.4 Multiple choice CEMC Gauss (Grade 8) · Canada · 2015

In the diagram, the value of $x$ is

Pick one

Official solution

Solution 1

At Gaussville School, $40\%$ or $\frac{40}{100}=\frac{4}{10}$ of the 480 total students voted for math.
Therefore, the number of students who voted for math is $\frac{4}{10}\times480=4\times48=192$ .

Solution 2

At Gaussville School, $40\%$ or 0.4 of the 480 total students voted for math.
Therefore, the number of students who voted for math is $0.4\times480=192$ .

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.