Hi,

Some of the books that are recommended by the University itself for preparing for the mathematics part of the masters entrance exam are as follows:-

1. G. B. Thomas, R. L. Finney, Calculus and Analytic Geometry, Addison Wesley. C. L. Liu, Elements of Discrete Mathematics, McGraw-Hill.

2. An Introduction to Applied Probability, John Wiley.

You can visit the below official website to download the syllabus and books reference given.

http://cs.du.ac.in/admission/mcs/

I hope this helps.

All the best.