10. Phil has completed 1/4 of his shift; Darren has completed 3/7 of his shift; Alice has finished 1/8 of her shift; Lisa has 1/5 of her shift remaining. Out of the four employees, who has completed the least work time?

A. Phil

B. Lisa

C. Darren

D. Alice

11. It takes 10 hours to type 4 reports. How long will it take to type 15 reports?

A. 5 hours, 30 minutes

B. 6 hours

C. 37 hours, 30 minutes

D. 60 hours

12. Heidi can proofread 26 files in an hour, while Sarah can proofread 49 files in an hour. If they have 550 files to proofread, how much time will it take between the two of them?

A. 7.3 hours

B. 11.2 hours

C. 21.2 hours

D. 23.9 hours

13. Of the following fractions: 1/4, 7/9, 7/12, and 9/16, which is the largest?

A. 7/9

B. 1/4

C. 7/12

D. 9/16

14. If a copier contains 75% letter-size paper and 25% legal-size paper, what is the ratio of letter-size paper to legal-size paper?

A. 1:2

B. 1:3

C. 2:1

D. 3:1

15. In Marin County, there are 80 teachers to every 4 teacher assistants. If there are 33,500 teachers, how many teacher assistants are there in the county?

A. 549

B. 837

C. 1675

D. 2062