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Q: A and B can do a job together in 7 days. A is 1 3/4  times as efficient as B. The same job can be done by A alone in :
A. 9 1/3 days
B. 11 days
C. 12 1/4 days 
D. 16 1/3 days

Answer and Explanation

Answer:11 days

Explanation:

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