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The circle has a diameter of 1 cm, as shown.

The circumference of the circle is between

Pick one

A $\text{2 cm and 3 cm}$ B $\text{3 cm and 4 cm}$ C $\text{4 cm and 5 cm}$ D $\text{5 cm and 6 cm}$ E $\text{6 cm and 8 cm}$

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Official solution

Exactly 2 of the $2+3+4=9$ seeds are sunflower seeds.

Therefore, the probability that Carrie chooses a sunflower seed is $\frac{2}{9}$.

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