4 men and 3 women finish a job in 6 days, and 5 men and 7 women can do the same job in 4 days.
How long will 1 man and 1 woman take to do the work?
(a) 22 (2/7) days
(b) 25 (1/2) days
(c) 5 (1/7) days
(d) 12 (7/22) days
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Answer:
22 (2/7) days
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