Final answer:
The proportion of participants who were from Wisconsin and 12 years old is 6/15.
Step-by-step explanation:
The subject of this question is Mathematics and the grade level is Middle School.
To answer the question, we need to calculate the proportion of participants who were both from Wisconsin and 12 years old.
First, let's find the total number of participants from Wisconsin.
If 7/9 of the participants were from Wisconsin, and the total number of participants is represented by x, then the number of participants from Wisconsin is (7/9)x.
Next, let's find the number of participants from Wisconsin who were 12 years old.
If 6/15 of the Wisconsin participants were 12 years old, then the number of 12-year-old participants from Wisconsin is (6/15)(7/9)x.
To find the proportion, we divide the number of 12-year-old Wisconsin participants by the total number of participants:
Proportion = [(6/15)(7/9)x] / [(7/9)x]
Simplifying the equation, we get:
Proportion = 6/15
The proportion of participants who were from Wisconsin and 12 years old is 6/15.