Hi,

With the marks of 48 and belonging to the SC category the chances of getting a seat in IISER is quite very difficult.  To get admission in IISER you marks is low . you don't have chance to get seat in IISER because of its difficulty level. Also the cutoff goes quite higher so your chances are quite low. Hoping for the best. For more information refer to

https://engineering.careers360.com/articles/iiser-merit-list-and-cutoff