First of literally no idea what permutation n had to google that but i would say YES study those at least the formula n how to apply it remember the hast is NOT MATH! its PROBLEMS USING MATH TO SOLVE THEM! meaning i would (using permutation as an example) want to reorganise a shelf, there is … and ….. (not bothered writing an actual question) how many different ways can i organise it? this is not a math problem its a question that requires math to find a solution n u dont even have to if it was real i could just literally reorganise them many times n write down the number of times… u get what i mean?
overall i think u should focus more on studying ur level n another level cus at the end of the day i dont think the exam is going to be above ur level uk what i mean?