Maths Olympiad Prep

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Problem 23

Combinatorics Difficulty 1.1 Find the answer CEMC Gauss (Grade 7) · Canada · 2018

In the diagram, the pie chart shows the results of a survey asking students to choose their favourite fruit.

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

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Official solution

Reading from the pie chart, 20%20\% of 100 students chose banana.

Since 20%20\% of 100 is 20, then 20 students chose banana.

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