Mathematics
posted by Devon .
In the universal set (U) reperesents all the students in a class.The set m represents the student who take (Music 3x).The set D represents the students who take (Drama 7+x).If 24 students take Music, calculate
The number of students who take BOTH music and drama.
The number of students who take drama ONLY.
Dont want the answers just want to know how to work out the problem.

More information is required.
What do the 7+x and 3x represent?