I have scored 91 in the SET 2018, What is the cutoff and when would i receive an email or a call for the PI?
It depends upon the number of people that appeared in the test and how many scored more than you. Its really difficult to predict such things. Say, let the cutoff is 100, you got 106, you are qualified. But the intake is say 150, they call 300 students for interview, your rank is 301, even if you qualify the parameters you wont be called. But dont lose hope.
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they should contact you soon and if they do not contact you , you can email them to their compliance cell given in their web site