Question
It takes Machine Y and Machine B 20 minutes to print a total of 1100 copies of posters. Machine Y can print 25 copies of posters in one minute. How many copies of posters can Machine Z print per minute?
2 m

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It takes Machine Y and Machine B 20 minutes to print a total of 1100 copies of posters. Machine Y can print 25 copies of posters in one minute. How many copies of posters can Machine Z print per minute?