Question

If U = {students attending a movie} and subset M = {male students attending a movie}, what is M'?
Answer

{male students attending a movie}

none of the above

{senior citizens attending a movie}

{male staff members at the movie}

Answer 1

M' is female students attending the movie. or trans-gendered i guess -

Answer 2

M = the rest of the students who attend a movie, which in this case - none of the above.