I'm going to chime in here and firstly say that there is quite a large amount of difference between unit 1&2 methods compared to 3&4, especially since the introduction of the new 1&2 course. A 32 in Methods is quite an average score, an average student, performing at an average level can expect to get a 30. Slightly above that at 32 is the same person on a different day with a different exam.
I don't mind suggesting you to rote learn theory if you are not confident in your ability to understand. I don't recommend it, but if you are not aiming for the highest score possible it is certainly a viable option.
Probability is also drastically different in 3&4, with more focus on the various distribution and their theory as opposed to calculations. You are expected to know your combinations and permutation formulae but the change you see a difficult one is unlikely. And even if you did, it is just a bit of tedious multiplying.
A 32 is achievable if anyone takes some time to forcibly remember theory, you won't score well, and you will benefit very little from the subject but you will get the score to get that ATAR you need for your course where you'll never see methods again.