bx-zone.com says :-
Around 70% of engineering or math students do not understand the importance of Discrete Mathematics subject while studying it. It’s when they try to get a job in ISRO as a junior scientist or secure a place in IITs for MTech when they realize that discrete mathematics is the subject that holds in its heart some amazing concepts, principles or theorems which align very much with the real world. Therefore, it’s always necessary to pay attention to discrete math and the graph theory at the graduate level. To understand the concept you need right books at the top of study table of yours and Discrete Mathemarics and its Applications is the book which bx-zone.com refers to. Get it at 26% from the city of Bengaluru.