The ratio that correctly models the situations are:
1 to 3 - for every cup of water added to the mixture, there are three drops of food colouring added.
4 : 3 - for every 4 students wearing pants, there are 3 students wearing shorts.
12 : 3 - there 4 times as many boys as there are girls.
What are ratios?
A ratio expresses the relationship between two numbers. It shows the number of times that one value is contained in another value. The sign used to represent ratios is :.
Please find attached the complete questions. To learn more about ratios, please check: https://brainly.com/question/25927869
