A, B and C can do a job in 6 days, 12 da...

A, B and C can do a job in 6 days, 12 days and 15 days respectively. After `(1)/(8)` of the work is completed, C leaves the job. Rest of the work is done by A and B together. Time taken to finish the remaining work is

`5 5/6` days

`5 1/4` days

`3 1/2` days

`3 3/4` days

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