[sebbb]

ok let me add a few more hands then

A)
99,88,44,89s : 12 hands- 10% equity
56c,AKc,QJc,TJc,67c : 5 hands- 50%
TJs, 67s (suit<>club): 6 hands - 65%
JJ+, A9s: 21 hands (ignoring AA) - 90%

B) total equity:
My answer: 60% equity, see below for "details"

I think this is equivalent to

29 hands with 50% equity, 6 hands with 65, 9 hands with 90%

or

29 hands with 50%, 15 hands with 80% (should be 30-15 if we add the other AA)

or

2 hands 50%, 1 hand 80%

My final answer: 60% equity


C) With A9, you have 18 more hands in the 10% group. I think the final answer would be around 35%, but I'm doing this quickly (I'd say 2/3 of hands we have globally a 50% equity, 1/3 about 10%)

D) number of hands in a given group of hands, equity against that group



Now let's see if my answers are ridiculous. BTW it took me a while to compute this, I wouldn't do that at the table.

Edit: results in white vs a
JJ+,99-88,44,AcKc,A9s,QcJc,JTs,98s,76s,6c5c range

<font color="white"> AA: 61%, A9: 28% (A9s=34%, A9o=26%)
not too bad I guess </font>