Rounding errors

I’m assuming it doesnt matter but does anyone know if there is a stated amount of decimals you should round at? I noticed with some of the probability questions, you can see variance of 5-10$ or more on some answers if you calulate the answers with longer decimals.

i think if you round to the number of decimals presented in the answer you should be ok. CFA typically lists three options that vary enough so that rounding errors would not be as much of an issue. that being said, i typically use 4 to be safe.