I'm seeking confirmation.

that the correct answer to this question is

, which is one of the choices in the multiple-choice version of the question, and why.

**Q**: A dance studio has

students. A poll shows that

study tap and

study ballet. What is the minimum number of students who are studying both tap and ballet?

I'm not clear if the question's original wording (which I don't have handy) meant that

students studying tap means "

students who study only tap" or "

students who are studying at least tap and possibly also ballet" (and the same ambiguous wording for ballet).

But note that

is less than

total students. So are there

other students who might have been taking both (

was

**not **answer choice).

Also,

students was not an answer choice - as in there are

students taking tap and all are also taking ballet, which has

more students, not taking tap.