Answer :
To solve the problem, follow these steps:
1. Understand the problem: Liliana wants to find out the number of students who use their computers out of the 20 surveyed and compare that to the total number of students surveyed.
2. List the data: We are provided with the number of hours 20 students spend on computers each week: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
3. Determine the students who use their computers: A student is considered to use their computer if their hours are greater than zero. So, we go through the list and count how many students have a number greater than zero.
In this case, we count each number greater than zero:
Numbers greater than 0 are: 8, 15, 11, 12, 13, 16, 13, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
Count of these numbers is 18.
4. Calculate the ratio: We compare the number of students who use their computers to the total number of students surveyed.
[tex]\[
\text{Ratio} = \frac{\text{Number of students using computers}}{\text{Total number of students surveyed}} = \frac{18}{20} = \frac{9}{10}
\][/tex]
Thus, 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 problem: Liliana wants to find out the number of students who use their computers out of the 20 surveyed and compare that to the total number of students surveyed.
2. List the data: We are provided with the number of hours 20 students spend on computers each week: 8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
3. Determine the students who use their computers: A student is considered to use their computer if their hours are greater than zero. So, we go through the list and count how many students have a number greater than zero.
In this case, we count each number greater than zero:
Numbers greater than 0 are: 8, 15, 11, 12, 13, 16, 13, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21.
Count of these numbers is 18.
4. Calculate the ratio: We compare the number of students who use their computers to the total number of students surveyed.
[tex]\[
\text{Ratio} = \frac{\text{Number of students using computers}}{\text{Total number of students surveyed}} = \frac{18}{20} = \frac{9}{10}
\][/tex]
Thus, 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].
