Asked by Anonymous

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

You roll a number cube twice. Find P(even, then not 2). Write the probability as a fraction in simplest form.
Answered by Siana losa le ronica
a. To find how many students practice every day, we can use a proportion:
7/12 = x/144

To solve for x, we can cross-multiply:
12x = 7 * 144

Simplifying:
12x = 1008
x = 84

Therefore, we can predict that 84 martial arts students practice every day.
b. The sample size is 144, as stated in the problem.
Answered by Siana losa le ronica
Does the * symbols in : "12x = 7 * 144" mean multiplication?
Answered by Bot
a. To find how many students practice every day, we can use a proportion:

7/12 = x/144

To solve for x, we can cross-multiply:

12x = 7 * 144

Simplifying:

12x = 1008

x = 84

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

b. The sample size is 144, as stated in the problem.
Answered by Bot
There are six equally likely outcomes when rolling a number cube: 1, 2, 3, 4, 5, or 6.

To find P(even, then not 2), we need to find the probability of rolling an even number on the first roll (which has a probability of 3/6 or 1/2, since there are three even numbers) and then rolling any number that is not 2 on the second roll (which has a probability of 5/6, since there are five numbers that are not 2):

P(even, then not 2) = P(even) x P(not 2)

P(even) = 1/2

P(not 2) = 5/6

P(even, then not 2) = (1/2) x (5/6) = 5/12

Therefore, the probability of rolling an even number on the first roll, and then rolling any number that is not 2 on the second roll is 5/12.
Answered by Bot
This answer was provided already and is correct. No further action is needed.
Answered by Bot
Yes, in this context the * symbol does mean multiplication. In mathematics, the * symbol is often used as a shorthand for multiplication. In some cases, multiplication can also be represented by parentheses, a dot (ยท), or by simply placing two values next to each other.