Marissa is researching information about martial arts students. She found that 7 out of 12 martial arts students 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, you can use a proportion. First, divide the total number of practicing students (7) by the total number of students surveyed (12):

7/12

Then, multiply that proportion by the total number of martial arts students at the school (144):

(7/12) x 144 = 84

Therefore, it is predicted that 84 martial arts students practice every day.

B. The sample size is the number of students surveyed, which is 12.

Answer 2

A number cube is rolled 450 times. The number 3 comes up 67 times.
A. What is the theoretical probability of rolling a 3? Answer as a fraction in simplest form.
B. What is the experimental probability of rolling a 3? Answer as a fraction in simplest form.