Joke Collection Website - Bulletin headlines - During a certain school’s reading activity of “Books Fill the Campus”, the student union organized a book donation activity. Picture (1) is a note from students donating books to the library.
During a certain school’s reading activity of “Books Fill the Campus”, the student union organized a book donation activity. Picture (1) is a note from students donating books to the library.
(1) The number of books donated by ninth graders is: 1000×30%×4=1200 (books)
The number of donated books by eighth graders is: 1000 ×35%×6=2100 (books)
The number of books donated by seventh graders is: 1000×35%×2=700 (books)
∴The total number of books donated is: 1200 +210700=4000 (books)
Therefore, the total number of books donated by students of this school is 4000.
(2) 4000÷1000=4 (books)
Therefore, on average, each person in the school donates 4 books.
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