P and Q can complete a job in 12 days and 16 days respectively. They work together for 4 days. What portion of work is left for completion?

P and Q can complete a job in 12 days and 16 days respectively. They w

1.	P and Q can complete a job in 12 days and 16 days respectively. They work together for 4 days. What portion of work is left for completion?
A.	3/4
B.	6/7
C.	5/12
D.	7/12
Answer» D. 7/12

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P and Q can complete a job in 12 days and 16 days respectively. They work together for 4 days. What portion of work is left for completion?

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