There are 435 memebers in the senate so 218 votes for a simple majrity. 215 lawyers and 17 women.

Best case none of the women are lawyers> So total votes = \(215+17=232\). More votes needed for majority 0.

Worst case all of the women are lawyers> So total votes = \(215\). More votes needed for majority 3.

Since we do not know how many lawyers are women we cannot find a solution to this question.
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This one is another overlapping set, sort of. Basically, since we can look up how many lawyers there are, and how many women there are, they want you to add the two and figure out how many more would be needed for a majority. But since we don't know whether all the women are lawyers are none of them are, or somewhere in between, we don't know how much overlap there is between the two categories, so we can't answer the question. Thus, it's E.
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Why is it not C. 3? For majority, there are 218 votes required in House of Representatives. There are 215 Lawyers and 17 women. Given there is full overlap, they require minimum 3 more votes for majority.

Oh right! Option D is 0, which is also an answer is best case possible scenario where as C. 3 is for worst case scenario. Thanks, this is good practice.

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