A, B and C can do a work in 6 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work?

 A, B and C can do a work in 6 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work?

A). 2 2/3 days

B). 4 2/3 days

C). 1 2/3 days

D). 2 1/3 days

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