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Question
jill asked 60 tenth and eleventh graders whether they have a part - time job or not. the table shows some of the results. complete the table.
Step1: Find the number of tenth - graders with part - time jobs
The total number of tenth - graders is 30 and the number of tenth - graders without part - time jobs is 18. So the number of tenth - graders with part - time jobs is $30 - 18=12$.
Step2: Find the number of eleventh - graders without part - time jobs
The total number of eleventh - graders is 30 and the number of eleventh - graders with part - time jobs is 20. So the number of eleventh - graders without part - time jobs is $30 - 20 = 10$.
Step3: Find the total number of students with part - time jobs
The number of tenth - graders with part - time jobs is 12 and the number of eleventh - graders with part - time jobs is 20. So the total number of students with part - time jobs is $12 + 20=32$.
Step4: Find the total number of students without part - time jobs
The number of tenth - graders without part - time jobs is 18 and the number of eleventh - graders without part - time jobs is 10. So the total number of students without part - time jobs is $18+10 = 28$.
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| Has part - time job | Does not have part - time job | Total | |
|---|---|---|---|
| Eleventh grade | 20 | 10 | 30 |
| Total | 32 | 28 | 60 |