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If two printing machines work simultaneously at their respective constant rates, how much time (in minutes) will it take for them to print out 100 copies of a photograph?
I. One of the machines prints at thrice the constant rate of the other machine.
II. One of the machines prints at a constant rate of 15 prints per minute.
Answer: E
Source: e-GMAT
I. One of the machines prints at thrice the constant rate of the other machine.
II. One of the machines prints at a constant rate of 15 prints per minute.
Answer: E
Source: e-GMAT
