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A can do 75% of a job in 9 days and B ca...

A can do 75% of a job in 9 days and B can do half of the job in 8 days. If they work on it together, then in how many days can they do half of the job?

A

`frac(40)(7)days`

B

`frac(24)(7) days`

C

`frac(7)(2)days`

D

`frac(9)(2)days`

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