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? 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.