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1. |
A and B can do a work in 12 days, B and C in 15 days, C and A in 20 days. If A, B and C work together, they will complete the work in? |
A. | 5 days |
B. | 10 days |
C. | 7(5/6) days |
D. | 15(2/3) days |
Answer» C. 7(5/6) days | |