A. Band C can complete a work in 10, 15 and 25 days, respectively. The time taken by A. B and C together to do the work is: 

1
\(3\frac{16}{31}\) days
2
\(4\frac{26}{31}\) days
3
\(3\frac{11}{31}\) days
4
\(4\frac{27}{31}\) days

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