3-day embryo grade at transfer question

Hello lovely ladies, did any of you do a fresh embryo transfer that resulted in a pregnancy? I know doctors have different grading systems, but all in all, I think it's all basically the same. I got my BFP and had 3 embryos transferred on day 3 which was 9 days ago: 8a, 8b, 7b.

Just wondering on the probabilities of all 3 successfully developing... curious to know!