Marissa is researching information about martial arts students. She found that 7 out of 12 martial artists practice every day. There are 144 martial arts students at a school.

Question

a. Predict how many students practice every day.

b. What is the sample size?

Answer 1

a. To find out how many students practice every day, we can use proportions. If 7 out of 12 students practice every day, we can set up a proportion:

7/12 = x/144

where x is the number of students who practice every day. Cross-multiplying, we get:

12x = 7*144

Simplifying, we get:

x = 84

Therefore, we predict that 84 martial arts students practice every day.

b. The sample size is the total number of martial arts students, which is given as 144.