Yes, you can. Unles this question is appropriate to ask, you will be replied smth like this: we don't know, we'll see later, it'’ ot relevant.
Also I would like to share with you 3 types of clarifying question which you can ask before structuring the interview:
questions that clarify the objective of the case interview
Here the basic things you have to know about the case objective:
2. questions about information that strengthens your understanding of the company
In this chapter the main things you have to know are:
Business model: How does the company make money? Do they sell directly to customers or do they sell through retailers or partners?
Products and services: What products and services does the company sell? What benefits do these products and services provide?
Geographic location: Does the company have one location or are they a national chain? Does the company operate in just one country or do they have an international presence?
3. question about definition of a term you are unfamiliar with
Most consulting interviews do not require you to have specialized knowledge or expertise in an industry. Therefore, if you come across a term that you are unfamiliar with, it is completely acceptable to ask the interviewer for the definition.