Given
Boys = 9
Girls = 10
Adults = 4
Find
ratio
Step-by-step explanation
girls to boys
as girls are 10 and boys are 9 ,
so the ratio =

boys and girls to adults
boys and girls = 9 + 10 = 19
so the ratio =

adults to boys and girls

Final Answer
a) 10:9
b) 19:4
c) 4:19