girls : boys = 3 : 4 = 3x : 4x
but we are told 3x = 9
x = 3
total students = 7x
= 21
check: we have 9 girls and 12 boys
ratio = 9:12 = 3:4,
my answer is correct
The ratio of girls to boys in Mrs. Webb’s class is 3 to 4. There are 9 girls in Mrs. Webb’s class. What is the total number of students in her class?
1 answer