

MCQOPTIONS
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1. |
A and B can do a job in 10 days. B and C can do the same job in 15 days. If all three worked together complete the work in 6 days, then in how many days can B complete the whole job? |
A. | 15 |
B. | 20 |
C. | B can't finish the work |
D. | None of these |
Answer» D. None of these | |