The efficiency of A, B and C to complete a job is the ratio 3 ∶ 4 – McqOptions

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1.	The efficiency of A, B and C to complete a job is the ratio 3 ∶ 4 ∶ 5. Working together, they can complete a job in 12 days. In how many days will A alone complete 75% of that job?
A.	45
B.	42
C.	36
D.	39
Answer» D. 39

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