Hi Kirube,
Any GMAT prep book from a reputable company should do, as all books cover these important topics. A word of warning on these two topics: make sure you don't study things that are too advanced, since the vast majority of geometry and probabily problems are pretty basic. So, you don't need to go out and buy a geometry textbook, for example - that would be overkill.
Good luck!
Geometry & Probability Study Material
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Source: Beat The GMAT — Quantitative Reasoning |












