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The school bought a batch of 240 books. If it is allocated to the fourth grade, the fifth grade and the sixth grade according to 2: 3: 5, how many books will be collected in each grade?
Number of books in the fourth grade: 240×22+3+5=48 (books),

Number of books in Grade Five: 240×32+3+5=72 (books),

Number of books in grade six: 240×52+3+5= 120 (this book).

Answer: There are 48 books in Grade Four, 72 books in Grade Five and 0/20 books in Grade Six.

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