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Mary and Nancy can each perform a certai...

Mary and Nancy can each perform a certain task in m and n hours, respectively. Is `mltn`?
(1) Twice the time it would take both Mary and Nacny to perform the task together, each working at their respective constant rates, is greater than m.
(2) Twice the time it would take both Mary and Nancy to perform the task together, each working at their respective constant rates, is less than n.

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The correct Answer is:
D
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