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Answer :
To solve the problem of finding the ratio of the number of students who used their computers to the total number of students surveyed, follow these steps:
1. Identify the Total Number of Students Surveyed:
Liliana surveyed 20 seventh-grade students at the town park.
2. Find the Number of Students Who Used Their Computers:
We need to count how many students spent any time on their computers, which means they used their computers for more than 0 hours. Look at the list of the number of hours each student spent on their computer:
```
8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21
```
Any student with a time greater than 0 indicates they used their computer. By counting these numbers in the list, we find that 18 students used their computers.
3. Calculate the Ratio:
The ratio of students who used their computers to the total number of students surveyed is given by:
[tex]\[
\text{Ratio} = \frac{\text{Number of students who used their computers}}{\text{Total number of students surveyed}}
\][/tex]
Substituting the values we have:
[tex]\[
\text{Ratio} = \frac{18}{20}
\][/tex]
This simplifies to [tex]\(\frac{9}{10}\)[/tex].
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. Identify the Total Number of Students Surveyed:
Liliana surveyed 20 seventh-grade students at the town park.
2. Find the Number of Students Who Used Their Computers:
We need to count how many students spent any time on their computers, which means they used their computers for more than 0 hours. Look at the list of the number of hours each student spent on their computer:
```
8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21
```
Any student with a time greater than 0 indicates they used their computer. By counting these numbers in the list, we find that 18 students used their computers.
3. Calculate the Ratio:
The ratio of students who used their computers to the total number of students surveyed is given by:
[tex]\[
\text{Ratio} = \frac{\text{Number of students who used their computers}}{\text{Total number of students surveyed}}
\][/tex]
Substituting the values we have:
[tex]\[
\text{Ratio} = \frac{18}{20}
\][/tex]
This simplifies to [tex]\(\frac{9}{10}\)[/tex].
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].
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