Horace Mann chances?

I’m currently in 8th grade and applying for Horace Mann 9th grade. What are the chances I get in?
ssat/isee scores:
ISEE:
verbal - 6 (73 percentile)
reading - 6 (73 percentile)
math - 9 (99 percentile, full score)
other math - 9 (99 percentile, full score)
SSAT:
verbal - 89 percentile
reading - 81 percentile
math - 99 percentile
extracurriculars:
squash, swimming, basketball, robotics team, debate
pianist, alto saxophone player
chess

At least be more detailed in explaining your EC’s and other parts of your application like interview, essays, recs, race, gender, etc.