Math: Exploring Probability Unit Test Part 2

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?

1 answer

a. To find out how many students practice every day, we can use proportion.

Let x be the number of students who practice every day.

Then, we can set up the proportion:

7/12 = x/144

To solve for x, we can cross-multiply:

12x = 7 * 144

12x = 1008

x = 84

Therefore, we can predict that 84 students practice every day.

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