Can anyone recommend good, free online articles or books to learn Discrete mathematics? When I google'd for them, I came across few resources..but don't know whether they are good to start learning with. It's better to know a tutorial or a book that get you started in Discrete Mathematics. Can readers of SE Mathematics can suggest a good starting point?
The UVic Discrete Mathematics Study Guide is also good for concise notes on the basics:
Try MIT Open Courseware -- Course 6.042J (Mathematics for Computer Science) on http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/ would be a good place to start.