Here’s the basis of the speculation :
Total number of seats at ISB - 900. Of which 225 are the deferrals from last year and around 180 candidates from YLP and EEO. Leaving a net intake of 495 for this year. An admission consultant told me that typically 8-10% of waitlisted candidates would get converts. So in a normal year the number of around 70-80 waitlisted candidates would get a convert. Given that this year the net class size is 495 and there would not be much deferrals because of COVID related restrictions, my assumption is that the movement in waitlist would be around 5% which is close to 25 candidates.