Question

D. 61

Just checking
I tend to 2nd guess a lot

Answer 1

You're correct: the logical OR operator is true whenever one of the two options is true.

So, the sales of shoes OR socks is given by the 52 and 9%, which together evaluates to $52+9=61$

Answer 2

WHen you see the word "or" in a probability problem, just add the probabilities together for your answer.

In this case:

52% + 9% = 61% (d)