A can do a work in 18 days, B in 9 days and C in 6 days. A and B start working together and after 2 days C joins them. What is the total number of days taken to finish the work ?



[ A ]    4.33 day
[ B ]    4.0 day right
[ C ]    4.66 day
[ D ]    5.33 day
[ E ]    None of these
Answer : Option B
Explanation :