Question
In a box, 40% of the files are yellow files and the rest are black and blue files. The number of blue files is thrice the number of black files. What percentage of the files in the box are black files?
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In a box, 40% of the files are yellow files and the rest are black and blue files. The number of blue files is thrice the number of black files. What percentage of the files in the box are black files?