Question

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

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.
a. Predict how many students practice every day.
b. What is the sample size?

Answer 1

Answer: 84

Explanation:

Set up a proportion as follows:
`\frac{\text{students that practice everyday}}{\text{total students}}`

`(7)/(12)=(x)/(144)`

Cross multiply: 12x = 7 × 144

Divide by 12: x = 7 × 12

Simplify: x = 84