Official GRE verbal mixed sets

GRE General
1

Hi,
I have been practicing the verbal mixed sets and am scoring this way:
19/25 on first 2 sets
21/25 on set 3

Missing more on RC which I will practice more of from the Big Book. Have my exam on 18th March.

Any comments on what level of competence I may be on and maybe what I could score on the actual test?

I also recently came across a multiple answer question in which all 3 options were correct in RC. How likely are those? It definitely took me by surprise. For reference: it is Q24 in mixed practice set 2 in the verbal OG second edition.

Thanks!