Hi Ramansh,
Firstly do take note of the fact that the number of seats available under Management Quota is entirely subjected to availability that is there is no guarantee that if you spend the bucks then you are to get the seats as they may get filled even before you apply, thus don't aim or rely your admission through management quota.
Now to answer your question, in most universities the number of seats available under management quota is 10 percent of the total seats available in that particular university under the particular course. For example, if a college has 100 seats for the CSE department then 10 seats of the 100 seats would be under management quota.
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