Question

The pie chart shows the results of surveying 200 college students to find out how many hours they worked per week at a job.

Answer 1

Hello! Firstly, let's get the important information from the exercise and write them here:

• more than 15 hours: 103 students

,

• 15 hours or less: 85 students

,

• didn't work: 12 students

,

• total: 200 students

Now, let's calculate each alternative:

a. ratio of more than 15 to less than 15:

To find the ratio, we will write the number of students who work more than 15 hours in the numerator, and in the denominator we will put the number of students who works less than 15 hours + students who didn't work, look:

`(103)/(85+12)=(103)/(97)\cong1.06`

b. ratio of students without a job to students who work more than 15 hours:

We'll solve in a similar way, look:

`\frac{\text{without a job}}{\text{more than 15h}}=(12)/(103)\cong0.1165`

c. ratio of students with jobs to the total of students:

`(103+85)/(200)=(188)/(200)=(47)/(50)\cong0.94`

d. ratio of students with jobs to students without jobs:

`(103+85)/(12)=(188)/(12)=(47)/(3)\cong15.67`