Answer:
12 girls 18 boys Total 30 students
Explanation
x=number of girls
18/3 = x/2
3x=18*2
3x=36
x=12
Other proof
x= number of groups
3x +2x = 30
5x=30
x=6
3*(6) + 2*(6) = 30
18+12=30
I think there is 9.
before it was simplified it might have been 6:9
then you simplify by 2 and get 3:2.
But i might be wrong so idk
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