Answer:
There are 27 children at the movie
Explanation:
We are given that for every 9 children, there are 4 adults.
So, ratio of Children to adult is 9:4
Let the ratio be x
So, no. of children = 9x
No. of adults = 4x
We are given that There are a total of 39 children and adults at the movie.
So,

So, no. of children = 9x = 9(3)=27
Hence there are 27 children at the movie