Re: The number of books

Posted by proneth on Jun 26, 2017; 1:31am
URL: http://ngl.70.s1.nabble.com/The-number-of-books-tp7576849p7576852.html

Let say, I have 10 copies of Alice in wonderland in the library. 5 books had been borrowed by some students. So there would be 5 left in its place. I want to know How can I do such a thing?