hi,

see cutoff score changes year to year and it depends on some certain factors like questions difficulty level, seat matrix, your choice of stream , category of candidates etc, however last year the qualifying score of sc candidates was,

Minimum Percentage of Marks in Each Subject- 5,

Minimum Percentage of Aggregate Marks- 17.5

according to students review sc candidate need to score more than 50 percentile, but its liable to change in every year and depends on various factors, you may follow the below link to know about the closing rank of previous years,

https://engineering.careers360.com/articles/jee-advanced-cutoff-for-iit-bombay

since jee main is important to qualify for jee advance, you may use careers360 jee main knockout program to boost up you performance,

https://learn.careers360.com/knockout-jee-main-april/