Hello ma'am
One cannot give the exact answer to this question as there are many colleges in DU providing n no of courses. Which have different fee structure which also varies whether you are generally student or have reservation. Then every college has different type of hostel providing different facility so the cost of them also varies a great deal.
If you get govt hostel it will be cheaper then private one.
But the estimate cost is arnd 5 to 6 lacs. It can go high if you are going for technically courses as they are very expensive as compare to general line course. I suggest check brochure of respective college it will give you a better idea.
All the best for you future.

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