A furniture manufacturer has two machines, but only one can be used at a time. Machine \(A\) is utilized during the

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A furniture manufacturer has two machines, but only one can be used at a time. Machine \(A\) is utilized during the first shift and Machine \(B\) during the second shift, while both work half of the third shift. If Machine \(A\) can do the job in \(12\) days working two shifts and Machine \(B\) can do the job in \(15\) days working two shifts, how many days will it take to do the job with the current work schedule?

A. 14
B. 13
C. 11
D. 9
E. 7

Answer: D

Source: GMAT Club Tests
Source: — Problem Solving |