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Q. A and B can complete a task in 20 days. B and C can complete the same task in 30 days. If A and C can complete the task in 40 days, arrange the efficiencies of A, B, and C in descending order.
A. A>B>C
B. A>C>B
C. B>A>C
D. B>C>A
E. C>A>B
OA C
Source: e-GMAT
A. A>B>C
B. A>C>B
C. B>A>C
D. B>C>A
E. C>A>B
OA C
Source: e-GMAT
