hi,

see if you are doing msc in mathematics but want to switch from msc course to management related course you can do it. but to get admission in top management institute it is required to appear in management entrance test. like cat, mat, xat, cmat etc. you may also do msc in some other subjects.  you need to contact with the college authority if they can switch you to other department and if fees reimbursement is possible or not.