If for every five students surveyed, two said they liked healthy food, we can calculate the total number of students who prefer healthy foods as follows:
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The ratio of students who like healthy food is 2 out of every 5 students.
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First, determine how many groups of 5 are in 35 students:
\[ \frac{35}{5} = 7 \text{ groups} \]
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Since 2 out of 5 students prefer healthy foods, we can calculate the number of students who prefer healthy foods:
\[ 2 \text{ students/group} \times 7 \text{ groups} = 14 \text{ students} \]
So, 14 students prefer healthy foods.