Math, thank you There is a pile of books for 25 children. No one scores 9 books on average. Some children come here and re score them. Each one scores 5 books on average. How many children come here~~~~ Thank you. Come on, thank you

Math, thank you There is a pile of books for 25 children. No one scores 9 books on average. Some children come here and re score them. Each one scores 5 books on average. How many children come here~~~~ Thank you. Come on, thank you

25*9=225
225/5=45
45-25=20
Here are 20 more children