Question
Lee has a total of 44 of blue and grey files. 15 of the blue files and half of the grey files are new. How many of his grey files are new if he has a total of 10 new files?
4 m

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Lee has a total of 44 of blue and grey files. 15 of the blue files and half of the grey files are new. How many of his grey files are new if he has a total of 10 new files?