Hello Amita

Rank predictor is based on the various factors.

Each rank predictor shows results on the behalf of their assumptions .

Generally they show results on the basis of prevuopr years results; number of students; their views and exam difficulty level.

So you can assume that it is accurate upto the +-10%( may vary depending upon the exact conditions)

Good luck

Hey Amita.

The GATE rank predictor use the data of the previous years and compare it with the current year scenario to provide u the result by calculating some of the informations provided by u. It may not be accurate about it's result but it is surely approximately correct. Most of the predictors have a formula fit in them which intakes your info and provides u the approximate answer as it itself says predictor.

Hope u got ur point. ask If u have any query.

Good luck