You have to have at least 60% in boards + under 500 ranking in NCHM exam which is held over all India. There is an entrance exam organized by the NCHM (NATIONAL COUNCIL OF HOTEL MANAGEMENT) and the committee decides on the basis of ranking to place in different IHM's. The faculty of IHM Mumbai is best and holds the second position in India for Hotel Management course.
Best institute. I loved it. My elder brother passed out this college last year and he is highly satisfied.