Calculator for Normal distribution calculations in MA and other exams.

Hello, sorry if this is a silly question but i’ve not actually sat my ACCA exams yet. I’ve completed a Maths degree previously and was just wondering if when answering questions involving probability distributions will I be penalized in MA for using a calculator to answer the questions instead of the probability distributions?

Or do they not see your workings because it’s a CBE? And if this is the case, will it ever be an issue in future paper based exams?

Many thanks

Damian