Description: A text file (file15. Some students, TXT files in the mathematics achievement, in accordance with the contents of each order: math class, student id, name, please complete the following questions,
1. The content of the document, and statistics show that form the total number.
2 the math statistics.
3 each class of statistics.
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File list (Check if you may need any files):
yizhongsujutongji.txt