A can do \(\frac{1}{3}\) of a work in 4 days and B can do \(\frac{3}{4}\) of the work in 15 days. Together, they will complete the work in 

1
\(4\frac{1}{4}\) days
2
\(5\frac{3}{4}\) days
3
\(8\frac{1}{4}\) days
4
\(7\frac{1}{2}\) days

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