Books in the library

Books in the library

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The library of my town is very small and the books are distributed in three categories only: Novel, Science and children.

Half of the books are novels, there are 101 books in the science section and 99 in the children's category.

How many books does the library have?


If we know that half of the books are novels and we have 200 books from the other categories, there will be as many novels in the library and therefore we will have 400 books in total.