railway RPF SI Mock Test Series 2024 Quantitative Aptitude Time and Work Work Efficiency

A can complete \({3\over 5}\) part of a work in 12 days. B can complete \({2\over 3}\) parts of the same work in 8 days. In how many days will A and B together complete the work?

1
\(7 {1\over 2}\) days
2
\(​6 {1\over 2}\) days
3
7 days
4
6 days
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