Answer :
To solve this problem, we need to find the ratio of the number of students who used their computers to the total number of students surveyed. Here's how we can do it step-by-step:
1. Understand the Data: We have a list of survey results that indicate the number of hours each of the 20 seventh-grade students spent on their computers.
2. Identify Students Using Computers: Count how many students reported spending more than 0 hours on their computers. This involves going through the list and counting every number that is greater than 0.
3. Count the Students: From the data provided:
- Students with hours greater than 0: 18 students (since 2 students reported 0 hours)
4. Total Number of Students Surveyed: There were 20 students in total surveyed.
5. Calculate the Ratio: We need to find the ratio of students who used their computers to the total number of students surveyed. This is calculated as:
[tex]\[
\text{Ratio} = \frac{\text{Number of Students who used computers}}{\text{Total Number of Students Surveyed}} = \frac{18}{20}
\][/tex]
6. Simplify the Fraction: The fraction [tex]\(\frac{18}{20}\)[/tex] simplifies by dividing both the numerator and the denominator by 2:
[tex]\[
\frac{18}{20} = \frac{9}{10}
\][/tex]
7. Choose the Correct Answer: The simplified ratio [tex]\(\frac{9}{10}\)[/tex] matches one of the answer choices given: [tex]\(\frac{18}{20}\)[/tex] or [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]\(\frac{9}{10}\)[/tex].
1. Understand the Data: We have a list of survey results that indicate the number of hours each of the 20 seventh-grade students spent on their computers.
2. Identify Students Using Computers: Count how many students reported spending more than 0 hours on their computers. This involves going through the list and counting every number that is greater than 0.
3. Count the Students: From the data provided:
- Students with hours greater than 0: 18 students (since 2 students reported 0 hours)
4. Total Number of Students Surveyed: There were 20 students in total surveyed.
5. Calculate the Ratio: We need to find the ratio of students who used their computers to the total number of students surveyed. This is calculated as:
[tex]\[
\text{Ratio} = \frac{\text{Number of Students who used computers}}{\text{Total Number of Students Surveyed}} = \frac{18}{20}
\][/tex]
6. Simplify the Fraction: The fraction [tex]\(\frac{18}{20}\)[/tex] simplifies by dividing both the numerator and the denominator by 2:
[tex]\[
\frac{18}{20} = \frac{9}{10}
\][/tex]
7. Choose the Correct Answer: The simplified ratio [tex]\(\frac{9}{10}\)[/tex] matches one of the answer choices given: [tex]\(\frac{18}{20}\)[/tex] or [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]\(\frac{9}{10}\)[/tex].
