Answer :
To find the ratio of the total number of students who used their computers to the total number of students surveyed, let's break it down step by step:
1. Understand the Information Given:
- Liliana surveyed 20 seventh-grade students.
- She recorded the number of hours each student spends on their computer.
2. Review Collected Data:
- The hours recorded for each student are: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, and 21.
3. Identify Students Using Computers:
- Look for the number of students who used their computers, which means more than 0 hours were recorded.
- From the data, the students who used their computers have hours greater than 0.
4. Count Students Who Used Computers:
- Go through the list and count how many entries are greater than 0.
- There are 18 students who spend more than 0 hours on their computers.
5. Calculate the Ratio:
- The ratio is the number of students who used their computer to the total number of students surveyed.
- This becomes [tex]\( \frac{18}{20} \)[/tex].
6. Simplify the Ratio:
- Simplify [tex]\( \frac{18}{20} \)[/tex] by dividing both the numerator and the denominator by their greatest common divisor, which is 2.
- [tex]\( \frac{18}{20} = \frac{9}{10} \)[/tex].
So, the ratio of students who used their computers to the total students surveyed is [tex]\( \frac{9}{10} \)[/tex].
1. Understand the Information Given:
- Liliana surveyed 20 seventh-grade students.
- She recorded the number of hours each student spends on their computer.
2. Review Collected Data:
- The hours recorded for each student are: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, and 21.
3. Identify Students Using Computers:
- Look for the number of students who used their computers, which means more than 0 hours were recorded.
- From the data, the students who used their computers have hours greater than 0.
4. Count Students Who Used Computers:
- Go through the list and count how many entries are greater than 0.
- There are 18 students who spend more than 0 hours on their computers.
5. Calculate the Ratio:
- The ratio is the number of students who used their computer to the total number of students surveyed.
- This becomes [tex]\( \frac{18}{20} \)[/tex].
6. Simplify the Ratio:
- Simplify [tex]\( \frac{18}{20} \)[/tex] by dividing both the numerator and the denominator by their greatest common divisor, which is 2.
- [tex]\( \frac{18}{20} = \frac{9}{10} \)[/tex].
So, the ratio of students who used their computers to the total students surveyed is [tex]\( \frac{9}{10} \)[/tex].
