Well, for your 1st question..
the % is with respect to the number passed from a region out of the total India. It is quite possible that very few appeared from the Eastern region and therefore the number of students who cleared is low. It is not, mind you, the pass % of students who have written from the East but a % of East vis-a-vis India.
For your 2nd question..
When a person clears both groups, it automatically means (s)he has cleared group 1 & group 2. So add the number (2440) of students who have passed in both groups to individual group total and you will see that the is no difference between the two releases. The overall difference of 4880 is nothing but twice the figure of students who have cleared both groups. Since it is added in individual group result, when shown separately again, it shows a difference.
Btw, your figures for individual groups are the other way around according to ICAI release.
Group 1: 7324 + 2440 = 9764
Group 2: 6644 + 2440 = 9084
CAclubindia
