A university reports the average GPA of its undergraduate students as 3.20. The average GPA of male students is 3.10, and the average GPA of female students is 3.35. What is the ratio of male students to female students at the university?
✓ Correct Answer: Option B
Let M be male students and F be female students. (3.10M + 3.35F) / (M + F) = 3.20. Rearranging gives 3.10M + 3.35F = 3.20M + 3.20F. This simplifies to 0.15F = 0.10M. Thus, M/F = 0.15/0.10 = 3/2. The ratio is 3:2.