Can someone please help me with this math question! I will mark brainiest if it's correct. There is a picture.

ANSWER
[tex]3\colon4[/tex]EXPLANATION
The school has 3 yellow buses and 4 green buses.
To find the ratio of yellow buses to green buses, we have to write it in the form:
[tex]a\colon b[/tex]where a = number of yellow buses
b = number of green buses.
That is:
[tex]3\colon4[/tex]That is the answer.