Question
It takes Machine C and Machine B 50 minutes to print a total of 3250 copies of posters. Machine C can print 31 copies of posters in one minute. How many copies of posters can Machine D print per minute?
2 m

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It takes Machine C and Machine B 50 minutes to print a total of 3250 copies of posters. Machine C can print 31 copies of posters in one minute. How many copies of posters can Machine D print per minute?