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1. |
A can finish 80% of a task in 12 days and B can finish 20% of the same task in 2 days. They started the task together, but B left after 2 days and A continued to work. In how many days was the entire task completed? |
A. | 17.5 |
B. | 10 |
C. | 15 |
D. | 12 |
Answer» E. | |