human
A school library has 120 books. Each student needs 5 books for their classes. The library was able to help 4 students on the first day of school, 5 students on the second day and 6 students on the third day. How many students can the library help out on the fourth day of school?
assistant
How many books did the library use on the first day? ** On the first day, the library used 4 students * 5 books = <<4*5=20>>20 books.
How many books did the library use on the second day? ** On the second day, the library used 5 students * 5 books = <<5*5=25>>25 books.
How many books did the library use on the third day? ** On the third day, the library used 6 students * 5 books = <<6*5=30>>30 books.
How many books did the library have left? ** On the fourth day, the library had 120 books - 20 - 25 - 30 = <<120-20-25-30=45>>45 books remaining.
How many students can the library help out on the fourth day? ** The library can help 45 books / 5 books = <<45/5=9>>9 students on the fourth day.
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