Kartik2121
Poorly written question. The stem needs to make it clear that the terms can be repetitive.
Posted from my mobile deviceThank you for the feedback.
However, writing out that the members of the set are unique would make this a non-GMAT question. The GMAT only tells you LIMITATIONS. For example, if the data set has only unique members. Similarly, the GMAT will only state you that a number is an integer. The question will not tell you that a number may not be an integer and similarly it will not tell you the members are not unique. If the question does not state limitations, you have to assume all scenarios. This makes the question harder.