Answer :
To solve the problem of finding the ratio of students who used their computers to the total number of students surveyed, follow these steps:
1. Understand the Data:
- Liliana surveyed 20 seventh-grade students.
- She recorded how many hours each student spent on their computers each week.
- The results given are: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
2. Identify Students Using Computers:
- We need to count the number of students who spent more than 0 hours on their computers.
- From the survey results, list all the entries that are greater than 0: 8, 15, 11, 12, 13, 16, 13, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
- There are 18 students in this list.
3. Calculate the Total Number of Students Surveyed:
- The total number of seventh-grade students surveyed is 20.
4. Determine the Ratio:
- The ratio of students who used their computers to the total number of students surveyed is 18 out of 20.
5. Express the Ratio in Simplest Form:
- The ratio 18/20 can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 2.
- Thus, the simplified ratio is 9/10.
Therefore, the ratio of the total number of students who used their computers to the total number of students surveyed is [tex]\(\frac{18}{20}\)[/tex] or [tex]\(\frac{9}{10}\)[/tex].
1. Understand the Data:
- Liliana surveyed 20 seventh-grade students.
- She recorded how many hours each student spent on their computers each week.
- The results given are: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
2. Identify Students Using Computers:
- We need to count the number of students who spent more than 0 hours on their computers.
- From the survey results, list all the entries that are greater than 0: 8, 15, 11, 12, 13, 16, 13, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
- There are 18 students in this list.
3. Calculate the Total Number of Students Surveyed:
- The total number of seventh-grade students surveyed is 20.
4. Determine the Ratio:
- The ratio of students who used their computers to the total number of students surveyed is 18 out of 20.
5. Express the Ratio in Simplest Form:
- The ratio 18/20 can be simplified by dividing both the numerator and the denominator by their greatest common divisor, which is 2.
- Thus, the simplified ratio is 9/10.
Therefore, the ratio of the total number of students who used their computers to the total number of students surveyed is [tex]\(\frac{18}{20}\)[/tex] or [tex]\(\frac{9}{10}\)[/tex].
