Amovie theater sells all 250 tickets on a particular night. students can get discounted tickets half off the normal $20 price. how many students buy tickets if the movie theater receives $4000 total from all the tickets they sell on that specific night?

Idon't know the answer. sorry 

Option a : week- amuont paid

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.