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 [tex] 52+9=61 [/tex]
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)
