Sir,I got 75%,294536 rank,190 score and 66% in 12 am i eligible to join in iiitb(international institute of information technology bglr)
No! With your percentile you don't have any chance of getting iiit Banglore.
Visit the below link to know the cut-off for IIITs
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits
Use the below link to know what colleges can you get with your rank
https://engineering.careers360.com/jee-main-college-predictor