Question

Liliana wants to start a seventh-grade computer club at Hamden Middle School. She surveyed 20 seventh-grade students at the town park. She asked each student how many hours they spend on their computers each week. She obtained the following results.

8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21

What is the ratio of the total number of students who used their computers to the total number of students surveyed?
StartFraction 2 over 20 EndFraction or StartFraction 1 over 10 EndFraction
StartFraction 2 over 18 EndFraction or StartFraction 1 over 9 EndFraction
StartFraction 18 over 20 EndFraction or StartFraction 9 over 10 EndFraction
StartFraction 18 over 2 EndFraction or StartFraction 9 over 1 EndFraction

Answer 1

To find the ratio of the total number of students who used their computers to the total number of students surveyed, we first need to determine how many students reported spending any time on their computers.

From the survey results:
8, 15, 0, 11, 12, 13, 16, 13, 0, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21

We can identify the students who used their computers (those who reported more than 0 hours). The values that are greater than 0 are:
8, 15, 11, 12, 13, 16, 13, 4, 17, 14, 30, 13, 5, 12, 1, 13, 12, 21

Counting these values, we find that there are 18 students who used their computers.

The total number of students surveyed is 20.

So, the ratio of the number of students who used their computers to the total number of students surveyed is:

\[
\frac{18}{20}
\]

This fraction simplifies to:

\[
\frac{9}{10}
\]

Thus, the answer is:

\[
\text{StartFraction 18 over 20 EndFraction or StartFraction 9 over 10 EndFraction}
\]