8
QuizMultiple Choice

Unit Rates

Question 8 • Pre-Algebra A-CR

The ratio of girls to boys in a classroom is 3:5. Kevin says there must be 8 students in the classroom. Which explains whether Kevin is correct?

Answer
A
Kevin is correct because 3 girls + 5 boys = 8 students.
B
Kevin is correct because 5 girls + 3 boys = 8 students.
C
Kevin is incorrect because 3:5 may be a simplified ratio.
D
Kevin is incorrect because the ratio 3:5 does not compare different units.

Explanation

A ratio of 3:5 means the numbers of girls and boys are in that proportion, not necessarily that there are exactly 3 girls and 5 boys. For example, there could be 6 girls and 10 boys, which still simplifies to 3:5. So Kevin cannot conclude there must be 8 students; choice C explains why he is incorrect.

AI-written and checked against the verified answer.

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