Frances can complete a job in 12 hours, and Joan can complete the same job in 8 hours. Frances starts the job at 9 a.m., and stops working at 3 p.m. If Joan starts working at 4 p.m. to complete the job, at what time is the job finished?
A. 6 p.m.
B. 7 p.m.
C. 8 p.m.
D. 10 p.m.
E. 12 p.m.
I wish GMAT QUANT could have been such easy to have allowed me extra time to prepare for verbal !!!
CONSIDER AWARDING KUDOS IF MY POST HELPS !!!