I saw a few people ask about the chances of acceptance in RD for deferred candidates. Here are my two cents.
Going purely by the numbers posted by @piesquared (thank you @piesquared), the chance of acceptance in RD will probably be around 10%, if every one that is not accepted so far is deferred.
If we assume 10,000 EA applications were rejected outright, the chance of acceptance will still be around 12%, well below acceptance rate in EA.
If we assume 20,000 EA applications were rejected outright, the chance of acceptance rises to 15%, still below the EA acceptance rate.
I have shown my work below. Please feel free to correct if I messed up with any numbers.
Received Accepted NU.IN Rejected Deferred
EA 34,000 5,500 1,600 0 26,900
ED1 1,900 700 340 0 860
ED2 1,000 368 179 0 453
Deferred 28,213
RD applications 27,000
Pending Applications 5,5213
Boston NU.IN
Total Acceptance 12,000 4,000
Accepted(ED1, EA and ED2) 6,568 2,119
Remaining Acceptance 5,432 1,881
Chance of Admission 10% 3%