There are math books one book at 5 different books at different chemistry books 4 books and the books Thai language courses 3 different books you shall find the number of ways to grab a book from the stack volume 1 .
Books pile has 5 different mathematics books chemistry books 4 different books and books. Thailand different language, find the number of ways to pick 3 books 1 book from this pile of books.
The books are different 5 one mathematics book book book different chemical 4 books. And the book teaching different 3 books. Seek the way that picks up the book 1 books from this pile of books!