Originally Posted by

**emily9843** The question is: A student is chosen at random, find the probability that they

- do not attend the revision sessions but improve their grade. (which i have the answer as 0.04 and it is correct. )

- improve their grade (answer = 0.85)

Now, with that given information i need to do this:

A student improves their grade, find the probability that they attended the revision sessions.

I'm not sure how to do this, but the answer is 0.95 - please show me the steps for this so i can do the others.

thank you